diff --git a/repl/package-lock.json b/repl/package-lock.json
index abe99f12..8574c551 100644
--- a/repl/package-lock.json
+++ b/repl/package-lock.json
@@ -20,6 +20,7 @@
         "react-codemirror2": "^7.2.1",
         "react-codemirror6": "^1.1.0",
         "react-dom": "^17.0.2",
+        "react-hook-inview": "^4.4.1",
         "react-scripts": "5.0.0",
         "tone": "^14.7.77",
         "web-vitals": "^2.1.4"
@@ -31,6 +32,7 @@
         "autoprefixer": "^10.4.4",
         "parcel": "^2.3.1",
         "postcss": "^8.4.12",
+        "process": "^0.11.10",
         "serve": "^13.0.2",
         "tailwindcss": "^3.0.23"
       }
@@ -16435,6 +16437,15 @@
         "url": "https://github.com/chalk/ansi-styles?sponsor=1"
       }
     },
+    "node_modules/process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
+      "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI=",
+      "dev": true,
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
     "node_modules/process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -16861,6 +16872,15 @@
       "resolved": "https://registry.npmjs.org/react-error-overlay/-/react-error-overlay-6.0.10.tgz",
       "integrity": "sha512-mKR90fX7Pm5seCOfz8q9F+66VCc1PGsWSBxKbITjfKVQHMNF2zudxHnMdJiB1fRCb+XsbQV9sO9DCkgsMQgBIA=="
     },
+    "node_modules/react-hook-inview": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/react-hook-inview/-/react-hook-inview-4.4.1.tgz",
+      "integrity": "sha512-JKx0+aWCna0YUfTCKSaphGbaMp25S/YjpWtfk5VbqhlESesOEAPr7TCGMRLS3Cv6I1mEDhWYIhz2YLHgnHX4Yw==",
+      "peerDependencies": {
+        "react": "^16.8.0 || ^17.0.0",
+        "react-dom": "^16.8.0 || ^17.0.0"
+      }
+    },
     "node_modules/react-is": {
       "version": "17.0.2",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
@@ -31994,6 +32014,12 @@
         }
       }
     },
+    "process": {
+      "version": "0.11.10",
+      "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
+      "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI=",
+      "dev": true
+    },
     "process-nextick-args": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
@@ -32317,6 +32343,12 @@
       "resolved": "https://registry.npmjs.org/react-error-overlay/-/react-error-overlay-6.0.10.tgz",
       "integrity": "sha512-mKR90fX7Pm5seCOfz8q9F+66VCc1PGsWSBxKbITjfKVQHMNF2zudxHnMdJiB1fRCb+XsbQV9sO9DCkgsMQgBIA=="
     },
+    "react-hook-inview": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/react-hook-inview/-/react-hook-inview-4.4.1.tgz",
+      "integrity": "sha512-JKx0+aWCna0YUfTCKSaphGbaMp25S/YjpWtfk5VbqhlESesOEAPr7TCGMRLS3Cv6I1mEDhWYIhz2YLHgnHX4Yw==",
+      "requires": {}
+    },
     "react-is": {
       "version": "17.0.2",
       "resolved": "https://registry.npmjs.org/react-is/-/react-is-17.0.2.tgz",
diff --git a/repl/package.json b/repl/package.json
index f4e3a9a8..eccac897 100644
--- a/repl/package.json
+++ b/repl/package.json
@@ -16,6 +16,7 @@
     "react-codemirror2": "^7.2.1",
     "react-codemirror6": "^1.1.0",
     "react-dom": "^17.0.2",
+    "react-hook-inview": "^4.4.1",
     "react-scripts": "5.0.0",
     "tone": "^14.7.77",
     "web-vitals": "^2.1.4"
@@ -56,6 +57,7 @@
     "autoprefixer": "^10.4.4",
     "parcel": "^2.3.1",
     "postcss": "^8.4.12",
+    "process": "^0.11.10",
     "serve": "^13.0.2",
     "tailwindcss": "^3.0.23"
   }
diff --git a/repl/src/App.js b/repl/src/App.js
index 2448ec62..46236294 100644
--- a/repl/src/App.js
+++ b/repl/src/App.js
@@ -33,6 +33,7 @@ import '@strudel.cycles/osc/osc.mjs';
 import '@strudel.cycles/webaudio/webaudio.mjs';
 import '@strudel.cycles/serial/serial.mjs';
 import controls from '@strudel.cycles/core/controls.mjs';
+import useHighlighting from './useHighlighting';
 
 extend(
   Tone,
@@ -71,7 +72,6 @@ const defaultSynth = getDefaultSynth();
 function App() {
   // const [editor, setEditor] = useState();
   const [view, setView] = useState();
-  const [codeToHighlight, setCodeToHighlight] = useState();
   const {
     setCode,
     setPattern,
@@ -90,11 +90,7 @@ function App() {
   } = useRepl({
     tune: decoded || randomTune,
     defaultSynth,
-    // onDraw: useCallback((time, event) => markEvent(editor)(time, event), [editor]),
-    // onDraw: useCallback((_, e, code) => code && highlightEvent(e, view, code), [view]),
-    onDraw: () => {},
   });
-  const [uiHidden, setUiHidden] = useState(false);
   const logBox = useRef();
   // scroll log box to bottom when log changes
   useLayoutEffect(() => {
@@ -119,28 +115,7 @@ function App() {
     return () => window.removeEventListener('keydown', handleKeyPress);
   }, [pattern, code, activateCode, cycle]);
 
-  useEffect(() => {
-    if (view) {
-      if (pattern && cycle.started) {
-        let frame = requestAnimationFrame(updateHighlights);
-
-        function updateHighlights() {
-          let audioTime = Tone.Transport.seconds;
-          let timespan = new strudel.TimeSpan(audioTime, audioTime + 1 / 60);
-          let events = pattern.query(new strudel.State(timespan));
-          view.dispatch({ effects: setHighlights.of(events) });
-
-          frame = requestAnimationFrame(updateHighlights);
-        }
-
-        return () => {
-          cancelAnimationFrame(frame);
-        };
-      } else {
-        view.dispatch({ effects: setHighlights.of([]) });
-      }
-    }
-  }, [pattern, cycle.started]);
+  useHighlighting({ view, pattern, started: cycle.started });
 
   useWebMidi({
     ready: useCallback(
@@ -167,10 +142,7 @@ function App() {
     <div className="min-h-screen flex flex-col">
       <header
         id="header"
-        className={cx(
-          'flex-none w-full h-14 px-2 flex border-b border-gray-200  justify-between z-[10]',
-          uiHidden ? 'bg-transparent text-white' : 'bg-gray-100',
-        )}
+        className="flex-none w-full h-14 px-2 flex border-b border-gray-200  justify-between z-[10] bg-gray-100"
       >
         <div className="flex items-center space-x-2">
           <img src={logo} className="Tidal-logo w-10 h-10" alt="logo" />
diff --git a/repl/src/tutorial/MiniRepl.jsx b/repl/src/tutorial/MiniRepl.jsx
index 7d49c9d5..f9fd4367 100644
--- a/repl/src/tutorial/MiniRepl.jsx
+++ b/repl/src/tutorial/MiniRepl.jsx
@@ -1,8 +1,9 @@
-import React, { useCallback, useMemo, useState } from 'react';
+import React, { useState } from 'react';
 import { Tone } from '@strudel.cycles/tone';
 import useRepl from '../useRepl.mjs';
-import CodeMirror, { markEvent } from '../CodeMirror';
 import cx from '../cx';
+import useHighlighting from '../useHighlighting';
+import { useInView } from 'react-hook-inview';
 
 // eval stuff start
 import { extend } from '@strudel.cycles/eval';
@@ -24,6 +25,7 @@ import '@strudel.cycles/xen/tune.mjs';
 import '@strudel.cycles/core/euclid.mjs';
 import '@strudel.cycles/tone/pianoroll.mjs';
 import '@strudel.cycles/tone/draw.mjs';
+import CodeMirror6 from '../CodeMirror6';
 
 extend(Tone, strudel, strudel.Pattern.prototype.bootstrap(), toneHelpers, voicingHelpers, drawHelpers, uiHelpers, {
   gist,
@@ -43,17 +45,19 @@ const defaultSynth = new Tone.PolySynth().chain(new Tone.Gain(0.5), Tone.Destina
 // "balanced" | "interactive" | "playback";
 // Tone.setContext(new Tone.Context({ latencyHint: 'playback', lookAhead: 1 }));
 function MiniRepl({ tune, maxHeight = 500 }) {
-  const [editor, setEditor] = useState();
-  const { code, setCode, activateCode, activeCode, setPattern, error, cycle, dirty, log, togglePlay, hash } = useRepl({
+  const { code, setCode, pattern, activateCode, error, cycle, dirty, togglePlay } = useRepl({
     tune,
     defaultSynth,
     autolink: false,
-    onDraw: useCallback(markEvent(editor), [editor]),
   });
   const lines = code.split('\n').length;
-  const height = Math.min(lines * 30 + 30, maxHeight);
+  const [view, setView] = useState();
+  const [ref, isVisible] = useInView({
+    threshold: 0.01,
+  });
+  useHighlighting({ view, pattern, started: cycle.started });
   return (
-    <div className="rounded-md overflow-hidden">
+    <div className="rounded-md overflow-hidden bg-[#444C57]" ref={ref}>
       <div className="flex justify-between bg-slate-700 border-t border-slate-500">
         <div className="flex">
           <button
@@ -101,18 +105,8 @@ function MiniRepl({ tune, maxHeight = 500 }) {
         </div>
         <div className="text-right p-1 text-sm">{error && <span className="text-red-200">{error.message}</span>}</div>{' '}
       </div>
-      <div className="flex space-y-0 overflow-auto" style={{ height }}>
-        <CodeMirror
-          className="w-full"
-          value={code}
-          editorDidMount={setEditor}
-          options={{
-            mode: 'javascript',
-            theme: 'material',
-            lineNumbers: true,
-          }}
-          onChange={(_, __, value) => setCode(value)}
-        />
+      <div className="flex space-y-0 overflow-auto relative">
+        {isVisible && <CodeMirror6 value={code} onChange={setCode} onViewChanged={setView} />}
       </div>
       {/* <div className="bg-slate-700 border-t border-slate-500 content-right pr-2 text-right">
         <a href={`https://strudel.tidalcycles.org/#${hash}`} className="text-white items-center inline-flex">
diff --git a/repl/src/useHighlighting.js b/repl/src/useHighlighting.js
new file mode 100644
index 00000000..964e2ab4
--- /dev/null
+++ b/repl/src/useHighlighting.js
@@ -0,0 +1,28 @@
+import { useEffect } from 'react';
+import { setHighlights } from './CodeMirror6';
+import { Tone } from '@strudel.cycles/tone';
+
+function useHighlighting({ view, pattern, started }) {
+  useEffect(() => {
+    if (view) {
+      if (pattern && started) {
+        let frame = requestAnimationFrame(updateHighlights);
+
+        function updateHighlights() {
+          const audioTime = Tone.getTransport().seconds;
+          const events = pattern.queryArc(audioTime, audioTime + 1 / 60);
+          view.dispatch({ effects: setHighlights.of(events) });
+          frame = requestAnimationFrame(updateHighlights);
+        }
+
+        return () => {
+          cancelAnimationFrame(frame);
+        };
+      } else {
+        view.dispatch({ effects: setHighlights.of([]) });
+      }
+    }
+  }, [pattern, started, view]);
+}
+
+export default useHighlighting;
diff --git a/repl/src/useRepl.mjs b/repl/src/useRepl.mjs
index 9427f36e..89615886 100644
--- a/repl/src/useRepl.mjs
+++ b/repl/src/useRepl.mjs
@@ -26,7 +26,7 @@ function useRepl({ tune, defaultSynth, autolink = true, onEvent, onDraw: onDrawP
   // below block allows disabling the highlighting by including "strudel disable-highlighting" in the code (as comment)
   const onDraw = useMemo(() => {
     if (activeCode && !activeCode.includes('strudel disable-highlighting')) {
-      return (time, event) => onDrawProp(time, event, activeCode);
+      return (time, event) => onDrawProp?.(time, event, activeCode);
     }
   }, [activeCode, onDrawProp]);