.container {
  border: 5px solid rgb(28, 27, 27);
  width: 800px;
  height: 800px;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  position: absolute;
}
/* Background image goes here */

canvas {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
#canvas1 {
  z-index: 10;
}
#canvas3 {
  z-index: 20;
}