Created
December 15, 2018 22:08
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JS Bin // source https://jsbin.com/yulamed
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width"> | |
| <title>JS Bin</title> | |
| </head> | |
| <body> | |
| <script id="jsbin-javascript"> | |
| var stage = document.createElement("canvas"); | |
| stage.style.backgroundColor = "black"; | |
| stage.style.width = "300"; | |
| stage.style.height = "300"; | |
| document.body.appendChild(stage); | |
| var ctx = stage.getContext("2d"); | |
| var ope = false; | |
| angle = 30; | |
| function draw(){ | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, 0, Math.PI*2,true); | |
| ctx.lineWidth = 41; | |
| ctx.strokeStyle = "black"; | |
| ctx.stroke(); | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, (Math.PI/180)*angle, -(Math.PI/180)*angle); | |
| ctx.lineWidth = 40; | |
| ctx.strokeStyle = "yellow"; | |
| ctx.stroke(); | |
| } | |
| setInterval(function(){ | |
| draw(); | |
| if(ope) | |
| angle++; | |
| else | |
| angle--; | |
| if(angle <= 1 || angle >= 30){ | |
| ope = (angle <= 1) ? true : false; | |
| } | |
| }, 6); | |
| </script> | |
| <script id="jsbin-source-javascript" type="text/javascript">var stage = document.createElement("canvas"); | |
| stage.style.backgroundColor = "black"; | |
| stage.style.width = "300"; | |
| stage.style.height = "300"; | |
| document.body.appendChild(stage); | |
| var ctx = stage.getContext("2d"); | |
| var ope = false; | |
| angle = 30; | |
| function draw(){ | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, 0, Math.PI*2,true); | |
| ctx.lineWidth = 41; | |
| ctx.strokeStyle = "black"; | |
| ctx.stroke(); | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, (Math.PI/180)*angle, -(Math.PI/180)*angle); | |
| ctx.lineWidth = 40; | |
| ctx.strokeStyle = "yellow"; | |
| ctx.stroke(); | |
| } | |
| setInterval(function(){ | |
| draw(); | |
| if(ope) | |
| angle++; | |
| else | |
| angle--; | |
| if(angle <= 1 || angle >= 30){ | |
| ope = (angle <= 1) ? true : false; | |
| } | |
| }, 6);</script></body> | |
| </html> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| var stage = document.createElement("canvas"); | |
| stage.style.backgroundColor = "black"; | |
| stage.style.width = "300"; | |
| stage.style.height = "300"; | |
| document.body.appendChild(stage); | |
| var ctx = stage.getContext("2d"); | |
| var ope = false; | |
| angle = 30; | |
| function draw(){ | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, 0, Math.PI*2,true); | |
| ctx.lineWidth = 41; | |
| ctx.strokeStyle = "black"; | |
| ctx.stroke(); | |
| ctx.beginPath(); | |
| ctx.arc(75,75,20, (Math.PI/180)*angle, -(Math.PI/180)*angle); | |
| ctx.lineWidth = 40; | |
| ctx.strokeStyle = "yellow"; | |
| ctx.stroke(); | |
| } | |
| setInterval(function(){ | |
| draw(); | |
| if(ope) | |
| angle++; | |
| else | |
| angle--; | |
| if(angle <= 1 || angle >= 30){ | |
| ope = (angle <= 1) ? true : false; | |
| } | |
| }, 6); |
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