<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector('canvas');
var pincel = tela.getContext('2d');
pincel.fillStyle = 'green';
pincel.fillRect(0, 0, 350, 300);
//olhos
pincel.fillStyle = 'black';
pincel.fillRect(210, 50, 90, 90);
pincel.fillStyle = 'black';
pincel.fillRect(50, 50, 90, 90);
//nariz
pincel.fillStyle = 'black';
pincel.fillRect(140, 140,70, 100);
//barba
pincel.fillStyle = 'black';
pincel.fillRect(100, 190, 40, 110);
pincel.fillStyle = 'black';
pincel.fillRect(205, 190, 40, 110);
</script>