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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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kyle_serbov

remix of d/34730 by u/kyle_serbov

function u(t) {

for(i=9999;i--;X+=A[D],Y+=A[D^3])!t++&&(M={},A=[S=D=0,4,0,-4],X=Y=600),x.fillRect(X,Y,4,4),M[X+A[r=-~D%4]+[Y+A[r^3]]]||(D=r),M[X+[Y]]=S++%55

Jan 10 2026 10:33 AM UTC

}// 140/140

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made it faster

u/kyle_serbov

You can change the number '55' at the end to give a different pattern.
u/ximavus

If you remove the %55 entirely it fills and leaves a internet logo

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kyle_serbov

function u(t) {

for(i=99;i--;X+=A[D],Y+=A[D^3])!t++&&(M={},A=[S=D=0,4,0,-4],X=Y=600),x.fillRect(X,Y,4,4),M[X+A[r=-~D%4]+[Y+A[r^3]]]||(D=r),M[X+[Y]]=S++%55

Jan 10 2026 10:29 AM UTC

}// 138/140

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Kyle's Ant

u/kyle_serbov

This one was hard to compress. It was originally rainbow coloured, the camera moved with it, and the trail slowly disappeared behind it, giving a more interesting pattern.

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seedanski

function u(t) {

for(i=9e3;i--;)x.fillStyle=`hsl(${i%360},99%,50%)`,x.fillRect(960+S(t+i/999)*i/9,540+C(t*2+i/999)*i/9+S(i/99)*99,4,4)

Jan 10 2026 7:44 AM UTC

}// 118/140

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Cosmic Firework Galaxy

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seedanski

function u(t) {

for(i=6e3;i--;)x.fillStyle=`hsl(${S(i*i+t)*360+t*60},99%,50%)`,x.fillRect(960+S(i+t)*i/3+C(i/9+t)*80,540+C(i-t)*i/3+S(i*i)*50,3,3)

Jan 10 2026 7:29 AM UTC

}// 131/140

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Liquid Plasma Storm

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seedanski

function u(t) {

c.width|=0;for(i=2e3;i--;x.fill())x.fillStyle=`hsl(${i+t*99},99%,${i/20}%)`,x.fillRect(960+i*S(t+i/99)*S(i),540+i*C(t-i/99)*C(i/9),9,9)

Jan 10 2026 7:27 AM UTC

}// 135/140

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Hypnotic Spiral Vortex

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tactical_retard

remix of d/34725 by u/tactical_retard

function u(t) {

for(i=1e4;i--;x.fillRect(e.x+=(e.x+e.y)/2e3,e.y+=S(e.x%e.y)*S(e.x/20)*5,1,.2)
)e=T[i]=t?T[i]:{x:i%100*19.2,y:(i/100|0)*10.8}

Jan 10 2026 5:02 AM UTC

}// 124/140

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tactical_retard

remix of d/34724 by u/tactical_retard

function u(t) {

for(i=1e4;i--;x.fillRect(e.x+=(e.x+e.y)/1e3,e.y+=S(e.x%e.y)*2,1,.1)
)e=T[i]=t?T[i]:{x:i%100*19.2,y:(i/100|0)*10.8}

Jan 10 2026 4:41 AM UTC

}// 114/140

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u/joeytwiddle

interesting textures

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tactical_retard

function u(t) {

for(i=1e4;i--;x.fillRect(e.x+=(e.x^e.y)/1e3,e.y+=e.x%e.y/1e3,1,.1)
)e=T[i]=t?T[i]:{x:i%100*19.2,y:(i/100|0)*10.8}

Jan 10 2026 4:24 AM UTC

}// 113/140

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Bit field

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DazeWare

function u(t) {

c.width=1920
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,29*S(t+i),200)

Jan 10 2026 2:40 AM UTC

}// 78/140

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rodrigo.siqueira

remix of d/34721 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(𝕏=X=Y=i=4e4;i--;𝕏=X,x.fillRect(Y*1630+960,X*1480,t<2,.1))X=T(X*X-Y*Y)+.3,Y=T(2*𝕏*Y+.1+S(t+i+S(i%2))/2)%.59

Jan 10 2026 2:20 AM UTC

}// 135/140

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Chaos fragmentation #chaos

Show more comments…
u/ximavus

Its like glass shattering. I like it!
u/DataMeta

Dope. Reminds me of a radioisotope cloud chamber
u/vain

Fantastic. That could be a real old photograph of something.
u/joeytwiddle

I think Cthulu's minions are coming through
u/SockTaters

smudgy cloud chamber
u/lewdev

Finally a new front page "top | year" dweet! I personally don't like the default. I think it should be the default for not-logged in users. And logged in users should be able to define which to default to in their user settings.