canvas绘制奥运五环代码分享
运行效果：
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<canvas id=drawing width=800 height=600>A drawing of someing!</canvas>
<script type=text/javascript>var drawing = document.getElementById('drawing');if(drawing.getContext) {//绘制奥运五环，画圆var context = drawing.getContext('2d');
context.lineWidth = 7;
context.strokeStyle = '#0180C3';
context.beginPath();
context.arc(70, 70, 40, 0, 2*Math.PI, false);
context.stroke();
context.strokeStyle = '#000';
context.beginPath();
context.arc(160, 70, 40, 0, 2*Math.PI, false);
context.stroke();
context.strokeStyle = '#BF0628';
context.beginPath();
context.arc(250, 70, 40, 0, 2*Math.PI, false);
context.stroke();
context.strokeStyle = '#EBC41F';
context.beginPath();
context.arc(115, 110, 40, 0, 2*Math.PI, false);
context.stroke();
context.strokeStyle = '#198E4A';
context.beginPath();
context.arc(205, 110, 40, 0, 2*Math.PI, false);
context.stroke();//环环相扣，画弧（实现相关圆弧的覆盖）context.strokeStyle = '#0180C3';
context.beginPath();
context.arc(70, 70, 40, 1.9*Math.PI, 2.1*Math.PI, false);
context.stroke();
context.strokeStyle = '#000';
context.beginPath();
context.arc(160, 70, 40, 1.9*Math.PI, 2.1*Math.PI, false);
context.stroke();
context.beginPath();
context.arc(160, 70, 40, 0.5*Math.PI, 0.7*Math.PI, false);
context.stroke();
context.strokeStyle = '#BF0628';
context.beginPath();
context.arc(250, 70, 40, 0.5*Math.PI, 0.7*Math.PI, false);
context.stroke();
}</script>
</body>
</html>
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