golf because why not, implementation is… by erin

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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erin

remix of d/11739 by u/katkip

function u(t) {

c.width=e=1920,x.globalCompositeOperation='xor',x.fillRect(0,540,e,e)
for(i=9;i--;)x.fillRect(400+i*100+S(t)*300,400,50,200)

Mar 30 2021 2:47 PM UTC

}// 124/140

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golf because why not, implementation is significantly more boring

u/New_Core

for(c.width|=i=9;i--;x.rect(0,540,e=2e3,e))x.rect(400+i*99+S(t)*300,400,50,200) x.fill("evenodd")


      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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