body {
  /*You can use any kind of background here.*/
  background: transparent;
}

canvas {
  display: block;
  position: relative;
  z-index: 1;
  pointer-events: none;
  position: absolute;
}


.buttonContainer {
  display: inline-block;
}

button {
  padding: 5px 10px;
  font-size: 20px;
}