Genial esta forma de dibujar.
<canvas width="600" height="400"></canvas>
<script>
var pantalla = document.querySelector("canvas");
var pincel = pantalla.getContext("2d");
pincel.fillStyle = "lightgrey";
pincel.fillRect(0,0,600,400);
// cabeza
pincel.fillStyle = "darkgreen";
pincel.fillRect(120,50,350,300);
// ojos
pincel.fillStyle = "black";
pincel.fillRect(170,100,90,90);
pincel.fillStyle = "black";
pincel.fillRect(330,100,90,90);
//nariz
pincel.fillStyle = "black";
pincel.fillRect(260,190,70,100);
//boca
pincel.fillStyle = "black";
pincel.fillRect(220,240,40,110);
pincel.fillStyle = "black";
pincel.fillRect(330,240,40,110);
## </script>