<canvas width = "600" height = "400"></canvas>
<script>
var tela = document.querySelector("canvas");
var pincel = tela.getContext("2d");
pincel.fillStyle = "SeaGreen";
pincel.fillRect(0, 0, 350, 300);
pincel.fillStyle = "black";
pincel.fillRect(45, 45, 90, 90);
pincel.fillRect(205 , 45, 90, 90);
pincel.fillRect(135 , 135, 70, 100);
pincel.fillRect(95 , 190, 40, 110);
pincel.fillRect(205 , 190, 40, 110);
</script>
