<canvas> 로 빛 추적 효과 (trail effect) 만들기

< 참고 자료 >

 

codepen.io/depy/pen/amoXGB

stackoverflow.com/questions/24344859/html5-canvas-create-fading-trail-from-object

www.growingwiththeweb.com/2012/10/creating-trail-effect-with-canvas.html

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