diff --git a/packages/core/ui.mjs b/packages/core/ui.mjs
index 84f799ef..68a4a6cb 100644
--- a/packages/core/ui.mjs
+++ b/packages/core/ui.mjs
@@ -6,10 +6,6 @@ This program is free software: you can redistribute it and/or modify it under th
 
 import { getTime } from './time.mjs';
 
-export const hideHeader = () => {
-  document.getElementById('header').style = 'display:none';
-};
-
 function frame(callback) {
   if (window.strudelAnimation) {
     cancelAnimationFrame(window.strudelAnimation);
diff --git a/repl/README.md b/repl/README.md
index c72b799a..dbb9d6c1 100644
--- a/repl/README.md
+++ b/repl/README.md
@@ -31,8 +31,8 @@ currently broken / buggy:
 
 - [x] MiniREPL
 - [x] repl log section
-- [ ] hideHeader flag
-- [ ] pending flag
+- [-] hideHeader flag => can now use zen mode
+- [x] pending flag
 - [x] web midi, TODO: test
 - [x] draw / pianoroll
 - [x] repl url hash does not work
@@ -43,8 +43,9 @@ currently broken / buggy:
 - [x] highlighting seems too late (off by latency ?)
 - [x] highlighting sometimes drops highlights (zeldasRescue first note)
 - [x] highlighting still sometimes drops highlights (zeldasRescue somtimes)
-- [ ] highlighting out of range error is back (delete large chunk at the top while highlighting below is triggered)
-- [ ] find a way to display errors when console is closed / another tab selected
 - [x] scheduler.getPhase is quantized to clock interval
   - => draw was choppy + that also caused useHighlighting bugs
-- [ ] pianoroll keeps rolling when pressing stop
+- [x] pianoroll keeps rolling when pressing stop
+- [ ] find a way to display errors when console is closed / another tab selected
+- [ ] highlighting out of range error is back (delete large chunk at the top while highlighting below is triggered)
+- [ ] idea: interpolate between running and evaluated code!
diff --git a/repl/src/App.jsx b/repl/src/App.jsx
index c6c363ca..17b021fe 100644
--- a/repl/src/App.jsx
+++ b/repl/src/App.jsx
@@ -59,8 +59,6 @@ Promise.all([...modules, presets]).then((data) => {
   loadedSamples = Object.entries(getLoadedSamples() || {});
 });
 
-const hideHeader = false;
-const pending = false;
 const getTime = () => getAudioContext().currentTime;
 
 async function initCode() {
@@ -109,6 +107,7 @@ function App() {
   const [lastShared, setLastShared] = useState();
   const [activeFooter, setActiveFooter] = useState('');
   const [isZen, setIsZen] = useState(false);
+  const [pending, setPending] = useState(false);
 
   const { code, setCode, scheduler, evaluate, activateCode, isDirty, activeCode, pattern, started, stop } = useStrudel({
     initialCode: '// LOADING',
@@ -118,6 +117,10 @@ function App() {
     beforeEval: () => {
       cleanupUi();
       cleanupDraw();
+      setPending(true);
+    },
+    afterEval: () => {
+      setPending(false);
     },
     onToggle: (play) => !play && cleanupDraw(false),
   });
@@ -249,7 +252,7 @@ function App() {
           //        'bg-gradient-to-t from-green-900 to-slate-900', //
         )}
       >
-        {!hideHeader && <Header />}
+        <Header />
         <section className="grow flex text-gray-100 relative overflow-auto cursor-text pb-0" id="code">
           <CodeMirror
             value={code}
diff --git a/repl/src/test/__snapshots__/tunes.test.mjs.snap b/repl/src/test/__snapshots__/tunes.test.mjs.snap
index 609c2087..cb43a340 100644
--- a/repl/src/test/__snapshots__/tunes.test.mjs.snap
+++ b/repl/src/test/__snapshots__/tunes.test.mjs.snap
@@ -8335,6 +8335,21 @@ exports[`renders tunes > tune: hyperpop 1`] = `
 ]
 `;
 
+exports[`renders tunes > tune: juxUndTollerei 1`] = `
+[
+  "3/4 -> 1/1: {\\"note\\":\\"c3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":0,\\"cutoff\\":1670.953955747281,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "1/2 -> 3/4: {\\"note\\":\\"eb3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":0,\\"cutoff\\":1524.257063143398,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "1/4 -> 1/2: {\\"note\\":\\"g3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":0,\\"cutoff\\":1361.2562095290161,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "0/1 -> 1/4: {\\"note\\":\\"bb3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":0,\\"cutoff\\":1188.2154262966046,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "0/1 -> 1/4: {\\"note\\":\\"c3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":1,\\"cutoff\\":1188.2154262966046,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "1/4 -> 1/2: {\\"note\\":\\"eb3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":1,\\"cutoff\\":1361.2562095290161,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "1/2 -> 3/4: {\\"note\\":\\"g3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":1,\\"cutoff\\":1524.257063143398,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "3/4 -> 1/1: {\\"note\\":\\"bb3\\",\\"s\\":\\"sawtooth\\",\\"pan\\":1,\\"cutoff\\":1670.953955747281,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "101/200 -> 201/200: {\\"note\\":65,\\"s\\":\\"triangle\\",\\"pan\\":0,\\"cutoff\\":1601.4815730092653,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+  "101/200 -> 201/200: {\\"note\\":55,\\"s\\":\\"triangle\\",\\"pan\\":1,\\"cutoff\\":1601.4815730092653,\\"decay\\":0.05,\\"sustain\\":0,\\"room\\":0.6,\\"delay\\":0.5,\\"delaytime\\":0.1,\\"delayfeedback\\":0.4}",
+]
+`;
+
 exports[`renders tunes > tune: meltingsubmarine 1`] = `
 [
   "0/1 -> 3/2: {\\"s\\":\\"bd\\",\\"speed\\":0.7519542165100574}",