t*=w=1e3 with(x)for(j=2;j--;beginPath(f… by rep_movsd

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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rep_movsd

remix of d/22844 by u/erin

function u(t) {

t*=w=1e3
with(x)for(j=2;j--;beginPath(fill()))for(i=w;i--;arc(t*50%2e3,t**1.2,t?j?80+S(i/20)*70:19:1e4,a=i/99,a))fillStyle=R(t*w,j*w,j*w);

May 22 2021 1:00 PM UTC

}// 138/140

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t*=w=1e3 with(x)for(j=2;j--;beginPath(fill()))for(i=w;i--;arc(t*50%2e3,t**1.2,t?j?80+S(i/20)*70:19:1e4,a=i/99,a))fillStyle=R(t*w,j*w,j*w);


      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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