.container {

  position: relative;
  width: 300px;
  height: 300px;
  margin: 0 auto;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  -o-user-select: none;
  user-select: none;
}

.canvas {
  position: absolute;
  top: 0;
}

.ret-dos{
    transition-delay: 2s;
-webkit-transition-delay: 2s; /* Safari */
-moz-transition-delay: 2s; /* Mozilla */
-o-transition-delay: 2s; /* Opera */
-ms-transition-delay: 2s; /* IE */
}