Golfed even more :D by BirdsTweetCodersDweet

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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BirdsTweetCodersDweet

remix of [deleted]

function u(t) {

c.width=w=1920;m=150;for(i=0;i++<m;)k=C(t*2+i/50)*255,x.fillStyle=R(255-k/2,0,k),x.fillRect(i/m*w,w/4+100*S(i/10+t/2),10,m*C(i+t))

Feb 22 2018 2:39 PM UTC

}// 130/140

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Golfed even more :D

u/snydej

Some more golfing: w=c.width+=0;for(i=m=150;i--;x.fillRect(i/m*w,w/4+100*S(i/10+t/2),10,m*C(i+t)))k=C(t*2+i/50)*255,x.fillStyle=R(255-k/2,0,k)


      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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