<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector("canvas");
var pincel = tela.getContext("2d");
pincel.fillStyle = "lightgrey";
pincel.fillRect(0, 0, 600, 400);
function desenhaCirculo(x, y, raio, cor) {
pincel.fillStyle = cor;
pincel.beginPath();
pincel.arc(x, y, raio, 0, 2 * 3.14);
pincel.fill();
}
desenhaCirculo(300, 200, 40, "red", 0, 2 * 3.14);
desenhaCirculo(300, 120, 40, "yellow", 0, 2 * 3.14);
desenhaCirculo(300, 280, 40, "blue", 0, 2 * 3.14);
desenhaCirculo(220, 200, 40, "orange", 0, 2 * 3.14);
desenhaCirculo(380, 200, 40, "black", 0, 2 * 3.14);
</script>
!((https://cdn1.gnarususercontent.com.br/1/1176376/8321e174-2482-4ff6-9d68-301dec7a3f14.png) )
