``` <canvas width="600" height="400"></canvas>
<script>
let tela = document.querySelector('canvas')
let pincel = tela.getContext('2d')
pincel.fillStyle = 'green'
pincel.beginPath()
pincel.fillRect(0, 0, 600, 400)
pincel.fillStyle = 'yellow'
pincel.beginPath()
pincel.moveTo(300, 50)
pincel.lineTo(550, 200)
pincel.lineTo(300, 350)
pincel.lineTo(50, 200)
pincel.fill()
pincel.fillStyle = "darkblue"
pincel.beginPath()
pincel.arc(300, 200, 100, 0, 2*3.14)
pincel.fill()
</script>
`
