<canvas width="600" height="400"></canvas>
<script>
var cara = document.querySelector("canvas");
var pincel = cara.getContext("2d");
//Cabeza
pincel.fillStyle = "darkgreen";
pincel.fillRect(0,0,350,300);
//Ojo izquierdo
pincel.fillStyle = "black";
pincel.fillRect(50,55,90,90);
//Ojo derecho
pincel.fillStyle = "black";
pincel.fillRect(210,55,90,90);
//Nariz
pincel.fillStyle = "black";
pincel.fillRect(140,145,70,100);
//Parte de la boca
pincel.fillStyle = "black";
pincel.fillRect(100,190,40,110);
//Parte de la boca
pincel.fillStyle = "black";
pincel.fillRect(210,190,40,110);
</script>