97B bouncing thing (i bet you can do it… by metamero

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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metamero

function u(t) {

w=c.width=1920
t?x.fillRect(a+=p,b+=q,z,z):a=b=p=q=z=42
a>=w-z||a<=0?p=-p:0
b>=1038||b<=0?q=-q:0

May 31 2019 6:52 PM UTC

}// 97/140

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97B bouncing thing (i bet you can do it smaller)

u/jylikangas

w=c.width|=0 t?x.fillRect(a+=p,b+=q,z,z):a=b=p=q=z=42 a%w<z?p=-p:0 b%1e3<z?q=-q:0 82b
u/joeytwiddle

77B by KilledByAPixel: c.width|=f=w=>(m=(3e3*t%w+w)%w,m>w/2?w-m:m);x.fillRect(f(3814),f(2118),42,42)
u/Xen

71B c.width|=f=w=>(m=3e3*t%w,m>w/2?w-m:m);x.fillRect(f(3814),f(2118),42,42)
u/jylikangas

f=w=>(m=3e3*t%w)>w/2?w-m:m;x.fillRect(f(3814),f(c.width=2e3),42,42) 67B


      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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