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function u(t) {
} //
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u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas.
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function u(t) {

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  • katkip: Same road but straight. - 63 characters golf
  • katkip: or even 76 bytes: x.fillRect(960-t*50,t*100,t*100,4),t%2<1?x.clearRect(960-t*5,t*100,t*10,4):0
  • yonatan: x.fillRect(960-t*50,q=t*99|0,q,4);x.clearRect(960-t*5,q,t*9,q**.5&1&&4) - there might be a better way without using clearRect

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u(t) is called 60 times per second. t: elapsed time in seconds. c: A 1920x1080 canvas. x: A 2D context for that canvas. S: Math.sin C: Math.cos T: Math.tan R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)