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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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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rodrigo.siqueira

remix of d/36227 by u/Axioplase

function u(t) {

for(i=w=c.width=800;i--;f=()=>x.getImageData(0,0,w,w))x.fillRect(i,0,S(w*(S(t+i/40)+C(t)*C(i/30))**9),1)
x.n=f(x.putImageData(x.n||f(),0,1))

Sep 4 2026 12:24 PM UTC

}// 140/140

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Undulations over noise

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oddbar

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁦𪑬𫁓𭁹𫁥🐧𘰰𜀰𜠧𛁦𪑬𫁒𩑣𭀨𜀬𜀬𜡥𜰬𜡥𜰩𛁩🐱𩐳𞱩𛐭𞰩𬰽𪐾🠵𛁡🐨𭀫𥀨𬰩𚠪𜠩𙐷𛁥🐨𤰨𪐪𪐩𚰲𚐪𨐪𞐹𛁦𪑬𫁓𭁹𫁥👒𚀲𝐵𛁳𚠸𛀰𛀲𛑡𚐬𩡩𫁬𤡥𨱴𚀹𝠰𚱓𚁳𚡳𚐪𝰰𜀫𠰨𪐩𚡥𛀴𜀰𚱃𚁳𚠹𚐪𜰰𜀫𤰨𪐩𚡥𚱡𚡡𚠹𞐬𝀬𝀩`.replace(/uD./g,'')))

Sep 1 2026 11:27 AM UTC

}// 140/140

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Chrysanthemum Volley #fireworks #particles

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Axioplase

function u(t) {

w=c.width=2e3
for(i=0;i<1e4;i++)
x.fillRect(w/2+C(t+i)*i/3,500+S(t+i)*i/3,a=20*S((t+i)*23),a)

Aug 28 2026 2:08 PM UTC

}// 93/140

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#spirals

u/Axioplase

If you use 22 instead of 23, you get circles in the negative space.

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rodrigo.siqueira

remix of d/36311 by u/rodrigo.siqueira

function u(t) {

for(m=1e4;m--;x.stroke())i=m&51,x.beginPath(x.strokeStyle=`hsl(${m**.6},90%,${70*S(m)}%`),x.arc(T(i)*m/2+960,9-m/S(m)*S(i),m/t**12,0,7)

Sep 22 2026 7:07 PM UTC

}// 135/140

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Space Pillars

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tzador

function u(t) {

c.width|=i=0
for(;i++<18;)for(j=0;j++<10;)x.save(),x.translate(i*99,j*99),x.rotate(S(S(t+i)+C(t+j))+t),x.fillRect(-30,-30,60,60),x.restore()

Sep 14 2026 12:17 AM UTC

}// 140/140

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Rotating boxes

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joeytwiddle

function u(t) {

for(c.width=960,i=2;i--;x.stroke())
x.fillRect(300+i*300,155-99*i-45*T(t-2*i*t)*S(t),60,330),x.arc(480,270,60+30*S(33+t*2),0,x.lineWidth=60)

Sep 12 2026 7:06 PM UTC

}// 140/140

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peckham digital

u/joeytwiddle

https://peckhamdigital.org/ #logo #tribute
u/erin

lol
u/magna

lol
u/tactical_retard

lol

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tzador

function u(t) {

for(i=96;i--;)for(j=54;j--;)x.fillStyle=R(S(i/9+t)*99+99,S(j/9+t)*99+99,S((i+j)/9-t)*99+99),x.fillRect(i*20,j*20,20,20)

Sep 8 2026 10:38 PM UTC

}// 119/140

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Plasma

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seiner

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㴰ⱸ⹦楬汒散琨〬〬㉥㌬㉥㌩ⱸ⹴牡湳污瑥⠹㘰ⰵ㐰⤬椽㈰〻椭ⴻ⥸⹲潴慴攨⸱⩃⡩⼹⭴⤩ⱳ㴲攴⼨ㄫ⡩⬹㤫㤹⩃⡴⤩┲〰⤬砮獴牯步却祬攽刨椪㈬㈵㔭椬椩ⱸ⹳瑲潫敒散琨⵳⼲Ⱝ猯㈬猬猩`.replace(/u([^D].)/g,'$1%')))

Sep 6 2026 7:04 PM UTC

}// 140/140

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rodrigo.siqueira

remix of d/36318 by u/rodrigo.siqueira

function u(t) {

for(m=8e3;m--;x.stroke())i=m&95,x.beginPath(x.strokeStyle=`hsl(${i/2},99%,${i*S(t)}%`),x.arc(C(k=m*m)*960+960,T(k)*m/i*t**-.2+540,t**-2,0,8)

Sep 23 2026 9:09 PM UTC

}// 140/140

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Stalactites and stalagmites

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PotatoImaginator

function u(t) {

c.width^=0
x.font="200px'"
x.fillStyle=R(128)
for(j=3;j--;)for(i=3;i--;)x.fillText(['F','A','N'][i],900+220*i*C(z=2*t+2.1*j),600+220*i*S(z))

Sep 22 2026 8:11 AM UTC

}// 140/140

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ceiling fan - #text

u/lewdev

Some golf techniques here: x.reset();x.fillStyle=R(128);x.font="2in'";for(j=9;j--;)x.fillText("FAN"[i=j/3>>0],900+220*i*C(z=2*t+2.1*j),600+220*i*S(z))
u/PotatoImaginator

Thanks :)
u/PotatoImaginator

Could you explain how [i=j/3>>0] works? I don't normally use right shift operator while coding 😅
u/PotatoImaginator

Ah j/3>>0 is floor function