<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector("canvas")
var pincel =tela.getContext("2d")
//cabeça
pincel.fillStyle= "darkgreen";
pincel.fillRect(150,50,350,300);
//olhos
pincel.fillStyle= "black";
pincel.fillRect(200,110,90,90);
pincel.fillRect(360,110,90,90);
//nariz
pincel.fillRect(290,200,70,100);
//boca
pincel.fillRect(250,240,40,110);
pincel.fillRect(360,240,40,110);
</script>