body {
  overflow: hidden;
}

#box-container {
  width:  100%;
  height:  100%;
  top:  0;
  left:  0;
  position: fixed;
  overflow: auto;
  display: flex;
  align-items:  center;
  flex-wrap:  wrap;
}

.clockblock {
  margin: 1vmin;
}

#clockbox {
  margin:  1vmin;
}