html,
body,
#responsive-canvas {
  display: block;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: rgb(255, 255, 255);
  position: relative;
  text-align: center;
}

#defaultCanvas0 {
  display: none;
  margin: 0 auto;
  overflow: hidden;
  align-items: center;
  justify-content: center;
  background-color: #111;
}
.loader {
  width: 30px;
  height: 30px;
  display: inline-block;
  position: relative;
}
.loader::after,
.loader::before {
  content: '';  
  box-sizing: border-box;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #FFF;
  position: absolute;
  left: 0;
  top: 0;
  animation: animloader 2s linear infinite;
}
.loader::after {
  animation-delay: 1s;
}

@keyframes animloader {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(1);
    opacity: 0;
  }
}