Created
October 18, 2016 03:38
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Pulsing Circle
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| <html> | |
| <head> | |
| </head> | |
| <body> | |
| <canvas id="canvas" width="600px" height="600px"></canvas> | |
| <script> | |
| var c = document.getElementById("canvas"); | |
| var deltas = []; | |
| for(var i = 1; i <= 10; i++) { | |
| deltas[i-1] = i; | |
| } | |
| for(var i = 10, j = 10; i > 0; i--, j++) { | |
| deltas[j] = i; | |
| } | |
| var index = 0; | |
| var radius = 40; | |
| setInterval(draw, 100); | |
| function draw() { | |
| var ctx = c.getContext("2d"); | |
| ctx.beginPath(); | |
| ctx.clearRect(0,0,600,600); | |
| var k = i++ % deltas.length; | |
| ctx.arc(95,50,40+deltas[k],0,2*Math.PI); | |
| ctx.stroke(); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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