body {
  background: #2e2e2e;
  color: #eee;
  overflow: hidden;
}
* {
  box-sizing: border-box;
}
#background {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0;
  height: 0;
}
#logo {
  display: none;
  width: 400px;
  height: 400px;
  text-align: center;
  line-height: 400px;
  margin-left: -200px;
  margin-top: -200px;
  pointer-events: none;
}
#background-content {
  position: absolute;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
}

canvas {
    border-radius: 2px;
}