diff --git a/visualisers/hmvis/package-lock.json b/visualisers/hmvis/package-lock.json
index 8fd5084..4b71123 100644
--- a/visualisers/hmvis/package-lock.json
+++ b/visualisers/hmvis/package-lock.json
@@ -7,6 +7,7 @@
       "dependencies": {
         "ace-builds": "^1.32.7",
         "react": "16.13.0",
+        "react-ace": "^10.1.0",
         "react-dom": "16.13.0"
       },
       "devDependencies": {
@@ -308,6 +309,11 @@
         "minimalistic-assert": "^1.0.0"
       }
     },
+    "node_modules/diff-match-patch": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/diff-match-patch/-/diff-match-patch-1.0.5.tgz",
+      "integrity": "sha512-IayShXAgj/QMXgB0IWmKx+rOPuGMhqm5w6jvFxmVenXKIzRqTAAsbBPT3kWQeGANj3jGgvcvv4yK6SxqYmikgw=="
+    },
     "node_modules/diffie-hellman": {
       "version": "5.0.3",
       "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
@@ -473,6 +479,16 @@
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
       "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
     },
+    "node_modules/lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha512-z+Uw/vLuy6gQe8cfaFWD7p0wVv8fJl3mbzXh33RS+0oW2wvUqiRXiQ69gLWSLpgB5/6sU+r6BlQR0MBILadqTQ=="
+    },
+    "node_modules/lodash.isequal": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
+      "integrity": "sha512-pDo3lu8Jhfjqls6GkMgpahsF9kCyayhgykjyLMNFTKWrpVdAQtYyB4muAMWozBB4ig/dtWAmsMxLEI8wuz+DYQ=="
+    },
     "node_modules/loose-envify": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
@@ -731,6 +747,22 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/react-ace": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/react-ace/-/react-ace-10.1.0.tgz",
+      "integrity": "sha512-VkvUjZNhdYTuKOKQpMIZi7uzZZVgzCjM7cLYu6F64V0mejY8a2XTyPUIMszC6A4trbeMIHbK5fYFcT/wkP/8VA==",
+      "dependencies": {
+        "ace-builds": "^1.4.14",
+        "diff-match-patch": "^1.0.5",
+        "lodash.get": "^4.4.2",
+        "lodash.isequal": "^4.5.0",
+        "prop-types": "^15.7.2"
+      },
+      "peerDependencies": {
+        "react": "^0.13.0 || ^0.14.0 || ^15.0.1 || ^16.0.0 || ^17.0.0 || ^18.0.0",
+        "react-dom": "^0.13.0 || ^0.14.0 || ^15.0.1 || ^16.0.0 || ^17.0.0 || ^18.0.0"
+      }
+    },
     "node_modules/react-dom": {
       "version": "16.13.0",
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.13.0.tgz",
@@ -1314,6 +1346,11 @@
         "minimalistic-assert": "^1.0.0"
       }
     },
+    "diff-match-patch": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/diff-match-patch/-/diff-match-patch-1.0.5.tgz",
+      "integrity": "sha512-IayShXAgj/QMXgB0IWmKx+rOPuGMhqm5w6jvFxmVenXKIzRqTAAsbBPT3kWQeGANj3jGgvcvv4yK6SxqYmikgw=="
+    },
     "diffie-hellman": {
       "version": "5.0.3",
       "resolved": "https://registry.npmjs.org/diffie-hellman/-/diffie-hellman-5.0.3.tgz",
@@ -1458,6 +1495,16 @@
       "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
       "integrity": "sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ=="
     },
+    "lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha512-z+Uw/vLuy6gQe8cfaFWD7p0wVv8fJl3mbzXh33RS+0oW2wvUqiRXiQ69gLWSLpgB5/6sU+r6BlQR0MBILadqTQ=="
+    },
+    "lodash.isequal": {
+      "version": "4.5.0",
+      "resolved": "https://registry.npmjs.org/lodash.isequal/-/lodash.isequal-4.5.0.tgz",
+      "integrity": "sha512-pDo3lu8Jhfjqls6GkMgpahsF9kCyayhgykjyLMNFTKWrpVdAQtYyB4muAMWozBB4ig/dtWAmsMxLEI8wuz+DYQ=="
+    },
     "loose-envify": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
@@ -1691,6 +1738,18 @@
         "prop-types": "^15.6.2"
       }
     },
+    "react-ace": {
+      "version": "10.1.0",
+      "resolved": "https://registry.npmjs.org/react-ace/-/react-ace-10.1.0.tgz",
+      "integrity": "sha512-VkvUjZNhdYTuKOKQpMIZi7uzZZVgzCjM7cLYu6F64V0mejY8a2XTyPUIMszC6A4trbeMIHbK5fYFcT/wkP/8VA==",
+      "requires": {
+        "ace-builds": "^1.4.14",
+        "diff-match-patch": "^1.0.5",
+        "lodash.get": "^4.4.2",
+        "lodash.isequal": "^4.5.0",
+        "prop-types": "^15.7.2"
+      }
+    },
     "react-dom": {
       "version": "16.13.0",
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-16.13.0.tgz",
diff --git a/visualisers/hmvis/package.json b/visualisers/hmvis/package.json
index 5bfc0a8..ebde054 100644
--- a/visualisers/hmvis/package.json
+++ b/visualisers/hmvis/package.json
@@ -5,6 +5,7 @@
   "dependencies": {
     "ace-builds": "^1.32.7",
     "react": "16.13.0",
+    "react-ace": "^10.1.0",
     "react-dom": "16.13.0"
   }
 }
diff --git a/visualisers/hmvis/public/css/main.css b/visualisers/hmvis/public/css/main.css
index 82ed759..d6ce1c6 100644
--- a/visualisers/hmvis/public/css/main.css
+++ b/visualisers/hmvis/public/css/main.css
@@ -1,26 +1,45 @@
+@import "solarized.css";
+
+html, body
+{ height: 100%
+}
+
 body {
     font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
-    color: green;
     overflow: hidden;
 }
 
-#editor {
-    margin: 0;
-    position: absolute;
-    top: 0;
-    bottom: 0;
-    left: 0;
-    right: 0;
+.editor-container
+{ position: relative
+; height: 80vh
 }
 
-#type-check {
+#editor
+{ width: 100%;
+; height: 100%
+; position: relative
+}
+
+#type-check-button {
     position: fixed;
     top: 0;
     left: 50%;
     z-index: 2;
+    /* margin: 0 auto; */
     transform: translateX(-50%);
 }
 
+#type-check-output
+{ background: green
+; width: 100%
+; height: 100%
+}
+
+.main-view-container
+{ columns: 2 auto;
+
+}
+
 .split {
     height: 100%;
     width: 50%;
@@ -40,14 +59,36 @@ body {
 }
 
 .annotation-wrapper
+{ display: inline-flex
+; flex-direction: column
+/* ; border-style: solid */
+/* ; border-width: 0 0 0.45em 0 */
+}
+
+.typed-wrapper
 { display: inline-block
-; padding-bottom: 1em
-; border-style: solid
-; border-color: green
-; border-width: 0 0 4px 0
 }
 
 .annotation-wrapper .annotation
-{ position: fixed
+{ position: relative
+; bottom: 0
+; min-height: 0.50em
 }
 
+.annotation-text
+{ display: none
+}
+
+.annotation.hovering > .annotation-text
+{ display: inline-block
+}
+
+.code-wrapper
+{ display: inline-block
+}
+
+/* .typed-wrapper.hovering > .code-wrapper */
+/* { border-width: 0.2em */
+/* ; border-style: solid */
+/* } */
+
diff --git a/visualisers/hmvis/public/css/solarized.css b/visualisers/hmvis/public/css/solarized.css
new file mode 100644
index 0000000..2ba66d1
--- /dev/null
+++ b/visualisers/hmvis/public/css/solarized.css
@@ -0,0 +1,303 @@
+@import url(http://fonts.googleapis.com/css?family=PT+Sans);
+@import url(http://fonts.googleapis.com/css?family=PT+Sans+Narrow:400,700);
+article,
+aside,
+details,
+figcaption,
+figure,
+footer,
+header,
+hgroup,
+nav,
+section,
+summary {
+  display: block;
+}
+audio,
+canvas,
+video {
+  display: inline-block;
+}
+audio:not([controls]) {
+  display: none;
+  height: 0;
+}
+[hidden] {
+  display: none;
+}
+html {
+  font-family: sans-serif;
+  -webkit-text-size-adjust: 100%;
+  -ms-text-size-adjust: 100%;
+}
+body {
+  margin: 0;
+}
+a:focus {
+  outline: thin dotted;
+}
+a:active,
+a:hover {
+  outline: 0;
+}
+h1 {
+  font-size: 2em;
+}
+abbr[title] {
+  border-bottom: 1px dotted;
+}
+b,
+strong {
+  font-weight: bold;
+}
+dfn {
+  font-style: italic;
+}
+mark {
+  background: #ff0;
+  color: #000;
+}
+code,
+kbd,
+pre,
+samp {
+  font-family: monospace, serif;
+  font-size: 1em;
+}
+pre {
+  white-space: pre-wrap;
+  word-wrap: break-word;
+}
+q {
+  quotes: "\201C" "\201D" "\2018" "\2019";
+}
+small {
+  font-size: 80%;
+}
+sub,
+sup {
+  font-size: 75%;
+  line-height: 0;
+  position: relative;
+  vertical-align: baseline;
+}
+sup {
+  top: -0.5em;
+}
+sub {
+  bottom: -0.25em;
+}
+img {
+  border: 0;
+}
+svg:not(:root) {
+  overflow: hidden;
+}
+figure {
+  margin: 0;
+}
+fieldset {
+  border: 1px solid #c0c0c0;
+  margin: 0 2px;
+  padding: 0.35em 0.625em 0.75em;
+}
+legend {
+  border: 0;
+  padding: 0;
+}
+button,
+input,
+select,
+textarea {
+  font-family: inherit;
+  font-size: 100%;
+  margin: 0;
+}
+button,
+input {
+  line-height: normal;
+}
+button,
+html input[type="button"],
+input[type="reset"],
+input[type="submit"] {
+  -webkit-appearance: button;
+  cursor: pointer;
+}
+button[disabled],
+input[disabled] {
+  cursor: default;
+}
+input[type="checkbox"],
+input[type="radio"] {
+  box-sizing: border-box;
+  padding: 0;
+}
+input[type="search"] {
+  -webkit-appearance: textfield;
+  -moz-box-sizing: content-box;
+  -webkit-box-sizing: content-box;
+  box-sizing: content-box;
+}
+input[type="search"]::-webkit-search-cancel-button,
+input[type="search"]::-webkit-search-decoration {
+  -webkit-appearance: none;
+}
+button::-moz-focus-inner,
+input::-moz-focus-inner {
+  border: 0;
+  padding: 0;
+}
+textarea {
+  overflow: auto;
+  vertical-align: top;
+}
+table {
+  border-collapse: collapse;
+  border-spacing: 0;
+}
+html {
+  font-family: 'PT Sans', sans-serif;
+}
+pre,
+code {
+  font-family: 'Inconsolata', sans-serif;
+}
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  font-family: 'PT Sans Narrow', sans-serif;
+  font-weight: 700;
+}
+html {
+  background-color: #eee8d5;
+  color: #657b83;
+  margin: 1em;
+}
+body {
+  background-color: #fdf6e3;
+  margin: 0 auto;
+  max-width: 23cm;
+  border: 1pt solid #93a1a1;
+  padding: 1em;
+}
+code {
+  background-color: #eee8d5;
+  padding: 2px;
+}
+a {
+  color: #b58900;
+}
+a:visited {
+  color: #cb4b16;
+}
+a:hover {
+  color: #cb4b16;
+}
+h1 {
+  color: #d33682;
+}
+h2,
+h3,
+h4,
+h5,
+h6 {
+  color: #859900;
+}
+pre {
+  background-color: #fdf6e3;
+  color: #657b83;
+  border: 1pt solid #93a1a1;
+  padding: 1em;
+  box-shadow: 5pt 5pt 8pt #eee8d5;
+}
+pre code {
+  background-color: #fdf6e3;
+}
+h1 {
+  font-size: 2.8em;
+}
+h2 {
+  font-size: 2.4em;
+}
+h3 {
+  font-size: 1.8em;
+}
+h4 {
+  font-size: 1.4em;
+}
+h5 {
+  font-size: 1.3em;
+}
+h6 {
+  font-size: 1.15em;
+}
+.tag {
+  background-color: #eee8d5;
+  color: #d33682;
+  padding: 0 0.2em;
+}
+.todo,
+.next,
+.done {
+  color: #fdf6e3;
+  background-color: #dc322f;
+  padding: 0 0.2em;
+}
+.tag {
+  -webkit-border-radius: 0.35em;
+  -moz-border-radius: 0.35em;
+  border-radius: 0.35em;
+}
+.TODO {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #2aa198;
+}
+.NEXT {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #268bd2;
+}
+.ACTIVE {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #268bd2;
+}
+.DONE {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #859900;
+}
+.WAITING {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #cb4b16;
+}
+.HOLD {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #d33682;
+}
+.NOTE {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #d33682;
+}
+.CANCELLED {
+  -webkit-border-radius: 0.2em;
+  -moz-border-radius: 0.2em;
+  border-radius: 0.2em;
+  background-color: #859900;
+}
+
diff --git a/visualisers/hmvis/public/index.html b/visualisers/hmvis/public/index.html
index 90797a6..35d59fe 100644
--- a/visualisers/hmvis/public/index.html
+++ b/visualisers/hmvis/public/index.html
@@ -12,18 +12,10 @@
 </head>
 <body>
 
-    <button id="type-check">type-check</button>
-    <div class="split left">
-<pre id="editor">id = \x -&gt x
-twice f x = f (f x)
-flip f x y = f y x
-</pre>
+    <div id="mount">
+        <div id="editor">
+        </div>
     </div>
-    <div class="split right" id="output">
-    </div>
-
-  <script src="/js/node_modules/ace-builds/src-min-noconflict/ace.js"></script>
-  <script src="/js/node_modules/ace-builds/src-min-noconflict/theme-solarized_light.js"></script>
   <script src="/js/main.js"></script>
 </body>
 </html>
diff --git a/visualisers/hmvis/src/hmvis/annotated.cljs b/visualisers/hmvis/src/hmvis/annotated.cljs
index a13efe1..9611ac0 100644
--- a/visualisers/hmvis/src/hmvis/annotated.cljs
+++ b/visualisers/hmvis/src/hmvis/annotated.cljs
@@ -24,62 +24,81 @@
 (defn formatln [fs & rest]
   (apply cl-format true (str fs "~%") rest))
 
-(defn Annotation [text visible?]
-  (if visible?
-      [:div {:class "annotation"}
-       text]
-      nil))
-
 (def nesting-rainbow (cycle ["red" "orange" "yellow"
                              "green" "blue" "purple"]))
 
-(defn Typed [t child]
+(defn text-colour-by-background [colour]
+  (match colour
+         "yellow" "black"
+         _        "white"))
+
+(defn Annotation [colour text hovering?]
+  [:div {:class (if @hovering?
+                    "annotation hovering"
+                    "annotation")
+         :on-mouse-enter #(reset! hovering? true)
+         :on-mouse-leave #(reset! hovering? false)
+         :style {:background colour
+                 :color (text-colour-by-background colour)}}
+   [:div {:class "annotation-text"}
+    text]])
+
+(defn Typed [colour t child]
   (let [hovering? (r/atom false)]
     (fn []
-        [:div {:class "annotation-wrapper"
-               :on-mouse-enter #(reset! hovering? true)
-               :on-mouse-leave #(reset! hovering? false)}
-         child
-         [Annotation t @hovering?]])))
+        [:div {:class "annotation-wrapper"}
+         [:div {:class (if @hovering?
+                           "typed-wrapper hovering"
+                           "typed-wrapper")
+                }
+          [:div {:class "code-wrapper"} child]]
+         [Annotation colour t hovering?]])))
 
 (declare Expr)
 
-(defn LambdaExpr [binds body]
+(defn LambdaExpr [colours binds body]
   [:<>
     [:code
       (hsep "λ" (apply hsep binds) "-> ")]
-    [Expr 0 body]])
+    [Expr colours 0 body]])
 
 (defn VarExpr [var-id]
   [:code var-id])
 
-(defn AppExpr [f x]
-  [:<> [Expr ppr/app-prec f]
+(defn AppExpr [colours f x]
+  [:<> [Expr colours ppr/app-prec f]
        " "
-       [Expr ppr/app-prec1 x]])
+       [Expr colours ppr/app-prec1 x]])
 
-(defn Expr [p {e :e t :type}]
+(defn Expr [[c & colours] p {e :e t :type}]
   (match e
     {:InL {:tag "LamF" :contents [bs body & _]}}
       (maybe-parens (< ppr/app-prec1 p)
-                    [Typed t [LambdaExpr bs body]])
+                    [Typed c t [LambdaExpr colours bs body]])
     {:InL {:tag "VarF" :contents var-id}}
-      [Typed t [VarExpr var-id]]
+      [Typed c t [VarExpr var-id]]
     {:InL {:tag "AppF" :contents [f x]}}
       (maybe-parens (< ppr/app-prec p)
-                    [Typed t [AppExpr f x]])
+                    [Typed c t [AppExpr colours f x]])
     :else [:code "<expr>"]))
 
+(def rainbow-cycle (cycle ["red"
+                           "orange"
+                           "yellow"
+                           "green"
+                           "blue"
+                           "violet"]))
+
 (defn render-decl [{name :name body :body}]
   [:code {:key name :display "block"}
-           (str name " = ") [Expr 0 body] #_ (render-expr body)
+           (str name " = ") [Expr rainbow-cycle 0 body] #_ (render-expr body)
            [:br]])
 
-(defn type-checker []
+(defn TypeChecker []
   [:div
    (map render-decl (or @tc-input []))])
 
-(defn init []
-  (rdom/render [type-checker]
-               (js/document.querySelector "#output")))
+; (defn init []
+;   (rdom/render [type-checker]
+;                (js/document.querySelector "#output")))
 
diff --git a/visualisers/hmvis/src/main.cljs b/visualisers/hmvis/src/main.cljs
index 0a4b5d3..647003e 100644
--- a/visualisers/hmvis/src/main.cljs
+++ b/visualisers/hmvis/src/main.cljs
@@ -1,16 +1,21 @@
 (ns main
   (:require [clojure.spec.alpha :as s]
+            ["react-ace$default" :as AceEditor]
+            ["ace-builds/src-noconflict/mode-haskell"]
+            ["ace-builds/src-noconflict/theme-solarized_light"]
+            ["ace-builds/src-noconflict/keybinding-vim"]
             [wscljs.client :as ws]
             [wscljs.format :as fmt]
             [cljs.core.match :refer-macros [match]]
             [hmvis.annotated :as annotated]
+            [reagent.core :as r]
             [reagent.dom :as rdom]))
 
-(def *editor
-  (doto (js/ace.edit "editor")
-        (.setTheme "ace/theme/solarized_light")
-        (.setKeyboardHandler "ace/keyboard/vim")
-        (.setOption "mode" "ace/mode/haskell")))
+; (def *editor
+;   (doto (js/ace.edit "editor")
+;         (.setTheme "ace/theme/solarized_light")
+;         (.setKeyboardHandler "ace/keyboard/vim")
+;         (.setOption "mode" "ace/mode/haskell")))
 
 (def *output (.querySelector js/document "#output"))
 
@@ -42,20 +47,55 @@
 (defn send [msg]
   (ws/send *socket msg fmt/json))
 
-(defn init-type-check-button []
-  (let [b (.querySelector js/document "#type-check")]
-    (.addEventListener b "click"
-                       #(send {:command "annotate"
-                               :source (.getValue *editor)}))))
+; (defn init-type-check-button []
+;   (let [b (.querySelector js/document "#type-check")]
+;     (.addEventListener b "click"
+;                        #(send {:command "annotate"
+;                                :source (.getValue *editor)}))))
+
+(defonce *editor nil)
+
+(defn TypeCheckButton []
+  [:button {:id "type-check-button"
+            :on-click #(send {:command "annotate"
+                              :source (.getValue *editor)})}
+   "type-check"])
+
+(defn Editor []
+  [:div {:class "editor-container"}
+    [(r/adapt-react-class AceEditor)
+     {:mode "haskell"
+      :theme "solarized_light"
+      :keyboardHandler "vim"
+      :defaultValue (str "id = \\x -> x\n"
+                         "flip f x y = f y x\n")
+      :style {:width "100%"
+              :height "100%"}
+      :on-load (fn [editor]
+                 (set! *editor editor)
+                 (set! (.. editor -container -style -resize) "both")
+                 (js/document.addEventListener
+                   "mouseup"
+                   #(.resize editor)))
+      :name "editor"} ]])
+
+(defn Main []
+  [:<>
+    [:div {:class "main-view-container"}
+     [TypeCheckButton]
+     [Editor]
+     [annotated/TypeChecker]
+     #_ [:div {:id "type-check-output"}
+      "doge soge quoge"]]
+   #_ [annotated/TypeChecker]])
 
 ;; start is called by init and after code reloading finishes
 (defn ^:dev/after-load start []
-  ; (rdom/render [type-checker] (js/document.getElementById "output"))
-  (annotated/init)
+  (rdom/render [Main]
+               (js/document.getElementById "mount"))
   (js/console.log "start"))
 
 (defn init []
-  (init-type-check-button)
   ;; init is called ONCE when the page loads
   ;; this is called in the index.html and must be exported
   ;; so it is available even in :advanced release builds