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