javascript canvas
<canvas id="canvas"></canvas> <script> var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); ctx.beginPath(); ctx.rect(x, y, width, height); ctx.fillStyle = 'limegreen'; ctx.fill(); ctx.beginPath(); ctx.arc(x, y, radius, startAngle, endAngle, counterClockWise(optional)); ctx.strokeStyle = 'black'; ctx.stroke(); </script>