參考資料:
《HTML5 Canvas 開發詳解》- 莫振杰
《HTML5 Canvas 核心技術》
[https://www.runoob.com/w3cnote/html5-canvas-intro.html](https://www.runoob.com/w3cnote/html5-canvas-intro.html)
[https://www.imooc.com/search/?type=course&words=canvas](https://www.imooc.com/search/?type=course&words=canvas)