<canvas width= "600" height="400"></canvas>
<script>
var pantalla = document.querySelector("canvas");
var pincel = pantalla.getContext("2d");
pincel.fillStyle = "darkgreen";
pincel.fillRect(0,0,350, 300);
pincel.fillStyle = "black";
pincel.fillRect(45,50,90,90)
pincel.fillStyle = "black";
pincel.fillRect(205,50,90,90);
pincel.fillStyle = "black";
pincel.fillRect(135,140,70,100);
pincel.fillStyle = "black";
pincel.fillRect(95,190,40,110);
pincel.fillStyle = "black";
pincel.fillRect(205,190,40,110);
</script>
