var canvas = document.getElementById("myCanvas"); var ctx = canvas.getContext("2d"); ctx.beginPath(); ctx.rect(20, 40, 50, 50); ctx.fillStyle = "#FF0000"; ctx.fill(); ctx.closePath(); ctx.beginPath(); ctx.arc(240, 160, 20, 0, Math.PI*2, false); ctx.fillStyle = "green"; ctx.fill(); ctx.closePath(); ctx.beginPath(); ctx.rect(160, 10, 100, 40); ctx.strokeStyle = "rgba(0, 0, 255, 0.5)"; ctx.stroke(); ctx.closePath();
<canvas id="myCanvas" width="480" height="320"></canvas>
canvas { background: #eee; }