<canvas width="600" height="400" > </canvas>
<script>
var pantalla = document.querySelector ("canvas");
var pincel = pantalla.getContext("2d");
//Cabeza
pincel.fillStyle = "darkgreen"
pincel.fillRect(0,0,350,300);
//Ojos
pincel.fillStyle = "black"
pincel.fillRect(50,40,90,90);
pincel.fillStyle = "black"
pincel.fillRect(210,40,90,90);
//Nariz
pincel.fillStyle = "black"
pincel.fillRect(140,130,70,100);
//Boca
pincel.fillStyle = "black"
pincel.fillRect(100,190,40,110);
pincel.fillStyle = "black"
pincel.fillRect(210,190,40,110);
</script>