Close Button

1. ADD to global script
function closeCanvas(evt) {
  evt.preventDefault();
  document.getElementsByTagName('head')[0].innerHTML = '';
  var _body = document.getElementsByTagName('body')[0];
  _body.innerHTML = '';
  _body.style.backgroundColor = 'transparent';
}

2. ADD position:relative to id "animation_container"
<div id="animation_container" style="position:relative; background-color:rgba(255, 255, 255, 1.00); width:600px; height:1200px; cursor: pointer">


3. ADD closebutton code
<a href="javascript:void(0);" onclick="closeCanvas(event);" style="position: absolute; right: 0; top: 0; z-index:1;"><img src="btn-close.png"></a>