New #d964 dweets

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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BackendForth

function u(t) {

v=Math.random
if(v()<.2)i=v()*1920,j=v()*1080
for(k=99;k--;){x.fillRect(i,j,3,3)
i+=(j-540)/70
j+=S((i-960)/70)
}

May 18 2021 1:34 AM UTC

}// 113/140

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Phase space for a pendulum

u/rep_movsd

Try
u/rep_movsd

v=Math.random x.fillStyle='#d964' if(v()<.9)i=v()*1920,j=v()*1080 for(k=99;k--;){x.fillRect(i,j,6*v(),80*v()) i+=(j-540)/(70 +v()*10) j+=S((i-960)/70) }
u/BackendForth

Neat! You can actually drop the "if(v()<.2)" altogether and tweak k=99 for some extra characters

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