body {
margin: 0;
}
canvas{
  display: block;
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0;
}
.container{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction:column;
  justify-content: center;
  align-items: center;
  z-index:2;
}
#progressbar{
  width:30%;
  height:3%;
  margin-top:10px;
}