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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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danny@hille.dk

remix of d/20747 by u/danny@hille.dk

function u(t) {

for(c.width=X=66;X--;)for(Y=44;Y--;x.fillStyle=R(o=S((Math.hypot(X-32,Y-21)/13-t)*5)*9,o*9,o**2))x.fillRect(X,Y,1,1)

Nov 20 2020 11:31 PM UTC

}// 116/140

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u/etury

Where/ how did you learn to become so good at generative art?
u/Xen

i wanna play

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cantelope

function u(t) {

for(p=c.width=(i=500)+C(t)*495;i--;x.arc(i*(v=p/16)%(p+(w=v/2)*2)-w,(i/(p+w*2)*v|0)*v+w,w,0,7),x.stroke())x.beginPath(),x.strokeStyle=`#50a`

Nov 23 2017 7:33 AM UTC

}// 140/140

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https://dweet.net/241/3558

u/Xen

thumbs up from me.

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scwaller

function u(t) {

eval(unescape(escape`挮睩摴桼㴰ⱸ⹴牡湳污瑥⠸〰ⰳ〰⤻爽⡹ⱸⱂ⤽㹹⩃⡂⤫砪匨䈩㭦潲⡩㴹㤻椭ⴻ砮晩汬剥捴⡲⡡砽爨椪㄰Ⱝ匨琩⨹㤬⸳⤬朽ⵃ⡩⨱〩ⱴ⼱〩Ⱳ⡓⡴⬽⸱⤪㤹ⱡ砬⸳⤬㤬㤩⥸⹦楬汓瑹汥㵒⠰ⰰⱩ⨲Ⱪ⨲⤻`.replace(/u(..)/g,"$1%")))

Mar 13 2021 6:04 AM UTC

}// 136/140

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couldn't golf it enough

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jviide

function u(t) {

c.width|=b=a=0
for(i=2000;i--;)
b+=C(4*i+a),a+=C(1.2*i+t),q=x.globalAlpha=(C(1.2*i-t)+1)/2,x.fillRect(960+500*a,540+100*b+S(t),10*q,10*q)

Mar 27 2019 12:13 AM UTC

}// 137/140

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Strange weave

u/iverjo

Smooth!

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zadgy5534

function u(t) {

for(i=w=99;i--;)for(j=69;j--;x.fillStyle=R(X/w,Y%w*2,w/t))
x.fillRect(X=900-T(i/t)*99,Y=500-1/S(i&t)*29,50,200) // draw 50x200 rects

Jan 30 2025 4:05 AM UTC

}// 132/140

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Constructions

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Agnes

remix of d/7684 by u/Agnes

function u(t) {

with(x)for(c.width|=i=15;i-->1;)for(j=5;j--;beginPath(),arc(960,540,150+25*i,o=i*t-3/j,6.3/j+o),lineWidth=2*j+5,strokeStyle=R(40*j))stroke()

Apr 16 2018 11:01 AM UTC

}// 140/140

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Turns out approximations of pi are fine if you're not multiplying with your bad approximation of pi.

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icecuber

function u(t) {

c.width=192;for(i=9;i--;)for(j=9;j--;)x.fillText((i+j*3+j/3|0)%9+1,i*11+12,j*11+12),x.fillRect(i*33-156,3,1,99),x.fillRect(9,i*33+2,100,1)

Nov 22 2016 7:31 PM UTC

}// 138/140

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u/iverjo

Awesome, a solved sudoku!
u/sigveseb

nice!
u/lionleaf

#sudoku
u/ximavus

I like it!

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taupelink

remix of d/25893 by u/taupelink

function u(t) {

eval(unescape(escape`稽㈯㌫䵡瑨⹲慮摯洨⤯㤹㭦潲⡭㵴㼰㨲攴㭭ⴭ㸲攳㭸⹦楬氨⤩砮扥杩湐慴栨砮晩汬却祬攽刨樽洪⨨津稩⬱㘬洯㌰Ⱪ㵭┳〰幪ⱱ㵓⡭⤪⨳攳⭪⼸攳⬮〳⤩ⱸ孭☶㐿❡牣✺❲散琧崨椪㤬㡥㐯樬樯焪⨮㈬樬樭㈩`.replace(/u([^D].)/g,'$1%')))

Aug 1 2022 10:15 AM UTC

}// 140/140

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d/25899

u/Joachim

Nice one.

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katkip

function u(t) {

for(c.width|=k=9;k--;)for(j=11;j--;){x.beginPath();for(i=4;i--;)x.fill(x.arc(160*j*1.2+C(i*1.6)*99,140*k+S(i*1.6)*99*C(j+t*3+k*1.6),0,0,0))}

Jun 29 2019 7:34 AM UTC

}// 140/140

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change all 1.6 to 1.57 for perfect squares #square #arc

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taupelink

remix of d/15772 by u/taupelink

function u(t) {

for(i=d=e=f=1e3;i--;x.fillRect(d*z,e*z,h=f/(1+f),h))[d,e,f]=[(r=1+Math.random(z=92)*z|0)/4+(r%9/8+f)*C(q=d^f),r%11+(f+4/r)*S(q+r),r%.7+.2/f]

Sep 27 2019 3:22 AM UTC

}// 140/140

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d/15820