<canvas width="600" height="400">
<script>
var pantalla = document.querySelector("canvas");
var pincel = pantalla.getContext('2d');
pincel.fillStyle = "darkgreen";
pincel.fillRect(200,50,350,300);
pincel.fillStyle = "black";
pincel.fillRect(250,110,90,90); //ojo izq
pincel.fillRect(410,110,90,90); //ojo der
pincel.fillRect(340,200,70,100); //nariz
pincel.fillRect(300,240,40,110);
pincel.fillRect(410,240,40,110);
pincel.fill();
</script>