Showing visuals only in strudel

Strudel
1

If you want to only show the visualisation in strudel, here's some code for toggling hiding the code on each eval:

if (window.toggle) {
  document.getElementById('test-canvas').style.backgroundColor = 'black'; 
  document.getElementById('test-canvas').style.zIndex = 100; 
  window.toggle = false;
}else {
  document.getElementById('test-canvas').style.backgroundColor = '';   
  window.toggle = true;
}