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, 50, 90, 90)
pincel.fillStyle = 'black'
pincel.fillRect(200, 50, 90, 90)
pincel.fillStyle = 'black'
pincel.fillRect(135, 140, 70, 100)
pincel.fillStyle = 'black'
pincel.fillRect(100, 200, 40, 110)
pincel.fillStyle = 'black'
pincel.fillRect(200, 200, 40, 110)
