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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.
Theme challenge of the month: #time
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  • Real Yellow vs Fake Yellow 🟡 #illusion

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  • Growing/Shrinking Wheel Illusion

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  • Noise bands with bending lines #illusion

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remix of d/20901 by u/pavel

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  • u/pavel
    Discovered this randomly when golfing the original. Not sure why it happens.
  • u/danny@hille.dk
    cool effect: the "feature" is caused by not truncating k=--i/120 -> k=--i/120|0 disables this feature :-)
  • u/KilledByAPixel
    👍
  • u/danny@hille.dk
    better solution: for(i=c.width|=p=g=>(g(0)?k&3:~~k/4)*200+150*g((k&1||-1)*(i%120*41/13+5*t));k=--i/120;)x.fillRect(560+p(S),240+p(C),9,9)

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  • Same Grey Circle

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  • Spheric Illusion

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  • There is only one gradient

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