Hypnotic Swirl 👁️ by KilledByAPixel

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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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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KilledByAPixel

function u(t) {

for(i=3e3;i--;x.fillRect(960+r*S(a=i/19),540+r*C(a),S(i+t*S(t))**8,t))r=t*60

Nov 30 2025 6:37 PM UTC

}// 76/140

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Hypnotic Swirl 👁️

u/New_Core

r=t*t*2 is pretty nice
u/ximavus

#illusion nice one
u/ximavus

I made this snippet though its 144/140 chars: z=_=>S(t+_*Math.random())*255 for(i=3e3;i--;){r=t*t*S(t);x.fillStyle=R(z(i),z(i),z(i));x.fillRect(960+r*S(a=i/19),540+r*C(a),S(i+t*S(t))**8,t);}
u/ximavus

based on this one of course


      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)

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