`
![]( )
var pantalla = document.querySelector("canvas");
var pincel = pantalla.getContext("2d");
pincel.fillStyle = "green"
pincel.fillRect(0,0,600,400);
pincel.fillStyle = "black"
pincel.fillRect(150,50,100,100);
pincel.fillStyle = "black"
pincel.fillRect(350,50,100,100);
pincel.fillStyle = "black"
pincel.fillRect(250,150,100,100);
pincel.fillStyle = "black"
pincel.fillRect(200,200,50,150);
pincel.fillStyle = "black"
pincel.fillRect(350,200,50,150);
`