<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector("canvas");
var pincel = tela.getContext("2d")
//CABEÇA
pincel.fillStyle = "green"
pincel.fillRect(0, 0, 350, 300)
//OLHO1
pincel.fillStyle = "black"
pincel.fillRect(50, 50, 90, 90)
// OLHO2
pincel.fillStyle = "black"
pincel.fillRect(200, 50, 90, 90)
// NARIZ
pincel.fillStyle = "black"
pincel.fillRect(140, 140, 60, 100)
// BOCA
pincel.fillStyle = "black"
pincel.fillRect(100, 200, 40, 100)
// BOCA2
pincel.fillStyle = "black"
pincel.fillRect(200, 200, 40, 100)
</script>