<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector ("canvas");
var pincel = tela.getContext ("2d");
pincel.fillStyle = "darkgreen";
pincel.fillRect (0,0,350,300);
pincel.fillStyle = "black";
pincel.fillRect (55, 50, 90, 90);
pincel.fillRect (215,50,90,90);
pincel.fillRect (145, 140, 70, 100);
pincel.fillRect (110, 190, 40, 110);
pincel.fillRect (210, 190, 40, 110);
</script>
