<canvas width="600" height="400"></canvas>
<script>
var pizarra = document.querySelector("canvas");
var lapiz = pizarra.getContext("2d");
lapiz.fillStyle = "#0002";
lapiz.fillRect(0, 0, 600, 400);
//CABEZA
lapiz.fillStyle = "darkgreen";
lapiz.fillRect(125, 50, 350, 300)
//OJO IZQUIERDO
lapiz.fillStyle = "black"
lapiz.fillRect(170, 110, 90, 90);
//OJO DERECHO
lapiz.fillStyle = "black"
lapiz.fillRect(330, 110, 90, 90);
//NARIZ
lapiz.fillStyle = "black"
lapiz.fillRect(260, 200, 70, 100);
//BOCA IZQUIERDA
lapiz.fillStyle = "black"
lapiz.fillRect(220, 240, 40, 110);
//BOCA DERECHA
lapiz.fillStyle = "black"
lapiz.fillRect(330, 240, 40, 110);
</script>