html, body {
  height: 100%;
  width: 100%;
  background: #ee9ca7;
  padding: 0;
  margin: 0;
  overflow: hidden;
}

canvas#canvas {
  background: #ee9ca7;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to bottom, #ffdde1, #ee9ca7);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to bottom, #ffdde1, #ee9ca7); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
}