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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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Zmyslon

function u(t) {

for(i=0;i<9;i++){
x.fillStyle=R(i*100+t*25%255,i*50+t*12%255,i*25+t*6%255,0.25)
x.fillRect(400+i*100+S(t)*300,400,S(t)*120,200)}

Sep 26 2026 6:56 PM UTC

}// 128/140

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I call this... Color Bleed!

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PotatoImaginator

function u(t) {

with(x){fillStyle=`hsl(${28.6*t},99%,50%)`,beginPath(fill(arc(960+400*C(t),540+200*S(2*t),80,0,7)))}

Sep 25 2026 11:24 AM UTC

}// 100/140

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#rainbow #infinity

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PotatoImaginator

remix of d/36326 by u/PotatoImaginator

function u(t) {

for(c.width|=j=9,x.font="2in'";j--;x.fillText("FAN"[i=j/3|0],900+220*i*C(z=2*t+2.1*j),600+220*i*S(z)))x.fillStyle=R(128)

Sep 25 2026 12:38 AM UTC

}// 120/140

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ceiling fan - #text - condensed v2

u/PotatoImaginator

Thanks to u/Xen

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Axioplase

function u(t) {

t?_:w=c.width=3e2;for(j=0;j<(h=500);j++)for(i=w;i--;)x.fillRect(i,j,d=u[j*w+i]=j?u[(j-1)*w+i]^u[(j-1)*w+(i+1)%w]:Math.random()*2|0,1)

Sep 9 2026 12:54 PM UTC

}// 133/140

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Cellular automaton

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Arn

function u(t) {

for(c.width|=0,x.globalAlpha=.4,i=500;i--;x.stroke(new Path2D('M'+[960+S(a)*500,540+C(a)*500,960+S(b)*500,540+C(b)*500])))b=(a=i/80)*t/3

Sep 5 2026 1:15 PM UTC

}// 136/140

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Arn

function u(t) {

with(x)for(fillStyle='#0001',fillRect(0,0,2e3,2e3),i=499;i--;)fillStyle=`hsl(${i-t} 90% 60%)`,fillRect(960+C(a=i/39+t)*i,540+S(a)*i,i%9,i%9)

Sep 5 2026 12:38 PM UTC

}// 140/140

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Chromatic Afterimage

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Arn

function u(t) {

for(x.drawImage(c,-9,-5,1938,1090),i=8;i--;x.fillRect(960+S(a)*r,540+C(a)*r,14,14))x.fillStyle=R(i*32,S(t)*255,255),a=t*2+i,r=333+S(t*3)*250

Sep 5 2026 12:06 PM UTC

}// 140/140

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The mill

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Axioplase

function u(t) {

c.width=2e3,s=150,x.t=x.translate
for(j=10;j--;)for(i=15;i--;)x.save(),x.t(s*i,s*j),x.rotate(t*S(i|j)),x.fillRect(-50,-50,99,99),x.restore()

Oct 1 2026 2:48 PM UTC

}// 140/140

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Rotating squares

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unixarcade

function u(t) {

c.width=1920;for(i=8;i--;)x.fillStyle=`hsla(${200+i*12+t*50},95%,60%,.2)`,x.fillRect(i*220+S(t+i)*35,420+C(t*1.3+i)*60,120,32)

Sep 30 2026 3:06 AM UTC

}// 126/140

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Corktown + Exo packs on a quiet Lightning storefront: zapable.net/profile/unixarcade — free demos on the gallery; zip after settle. Soft look only.

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unixarcade

function u(t) {

c.width=1920
for(i=9;i--;)x.fillStyle=`hsla(${280+i*8+t*30},90%,60%,.25)`,x.fillRect(i*200+S(t+i)*30,400+C(t*1.4+i)*70,140,36)

Sep 28 2026 7:26 AM UTC

}// 126/140

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soft commission glance: neon HTML loops / browser postcards for coffee→bill BTC — reply w/ 2 refs; scope first. corktown free demo on unixarcade onion gallery.

u/unixarcade

Small follow-up for anyone who likes the latch: custom neon HTML loops/browser postcards live here → http://uvciyu6g7eh2lsvp3v6l6mjh7lbdq6k2ca2za… — no pressure; two vibe refs + scope first. Thanks for looking.