table {
  border-collpase: collpase;
  border: 2px solid;
}

.cell {
  width: 20px;
  height: 20px;
  border: 2px solid;
  border-color: black;
  box-sizing: border-box;
}

td :not(.empty_cell) {
	box-shadow: 3px 3px 0px #2c2e38, 5px 5px 0px #5c5f72;
	margin: 20px
	padding: 20px
}

#container {
	border-color: black
	border: 1px solid;
}

.empty_cell {
  background-color: rgba(0, 0, 0, 0);
  border: 2px;
}

.I_tetrimino {
  background-color: FireBrick;
}
.O_tetrimino {
  background-color: blue;
}
.T_tetrimino {
  background-color: aquamarine;
}
.L_tetrimino {
  background-color: cadetBlue;
}
.J_tetrimino {
  background-color: BlueViolet;
}
.Z_tetrimino {
  background-color: darkkhaki
}
.S_tetrimino {
  background-color: Coral;
}