body {
  margin: 0;
  background-color: #193948;
}

#tGlass {
  background-color: #0B2936;
  height: 100vh;
  width: 50vh;
  margin: auto;
  position: relative;
}

.block {
  background-color: #124C64;
  width: 5vh;
  height: 5vh;
  position: absolute;
}