<canvas width=600 height=400></canvas>
<script>
var tela = document.querySelector('canvas');
var pincel = tela.getContext('2d');
pincel.fillStyle = 'darkgreen';
pincel.fillRect(0,0,350,300);
pincel.fillStyle = 'black';
pincel.fillRect(50,55,90,90)
pincel.fillRect(208,55,90,90)
pincel.fillRect(140,145,70,100)
pincel.fillRect(100,190,40,110)
pincel.fillRect(208,190,40,110)
</script>
