Flor desenhada.
<canvas width="600" height="400"></canvas>
<script>
var tela = document.querySelector('canvas');
var pincel = tela.getContext('2d');
pincel.fillStyle = 'lightgray';
pincel.fillRect(0, 0, 600, 400);
function fazCirculo(x, y, raio, cor){
pincel.fillStyle = cor;
pincel.beginPath();
pincel.arc(x, y, raio, 0, 2*3.14);
pincel.fill()
}
fazCirculo(300, 200, 20, 'red');
fazCirculo(300, 160, 20, 'yellow');
fazCirculo(300, 240, 20, 'green');
fazCirculo(260, 200, 20, 'blue');
fazCirculo(340, 200, 20, 'black');
</script>
