Centre la cara del creeper en el canva
<canvas width="600" height="400">
</canvas>
<script>
var pantalla = document.querySelector("canvas");
var pincel = pantalla.getContext("2d");
pincel.fillStyle= "white"
pincel.fillRect(0,0,600,400)
pincel.fillStyle= "green"
pincel.fillRect(125,50,350,300)
pincel.fillStyle = 'black';
pincel.fillRect(180, 110, 90, 90);
pincel.fillRect(340, 110, 90, 90);
pincel.fillRect(270, 200, 70, 100);
pincel.fillRect(230, 240, 40, 110);
pincel.fillRect(340, 240, 40, 110);
</script>
