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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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skeletonNatte

remix of d/34948 by u/dee-gomma

function u(t) {

x.font='700px p';x.fillText("🎯",510,740)

Mar 2 2026 4:25 PM UTC

}// 40/140

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golfed #joke #sorry

u/cantelope

kinda ruins it for the bull

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mathisvdr

function u(t) {

F=(X,Y)=>S(X/15+t*3)*99+C(Y/15+t*2)*99
for(X=96;X--;)for(Y=55;Y--;x.fillStyle=`hsl(${F(X*4,Y*8)+X} 90%50%)`)x.fillRect(X*20,Y*20,20,20)

Mar 1 2026 12:14 AM UTC

}// 135/140

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Plasma Grid

u/cantelope

very cool

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DazeWare

remix of d/34939 by u/DazeWare

function u(t) {

for(r=t*5e3,i=k=r/24<<1||1;t<1&&i--;x.fill())for(x.beginPath(j=4);j--;)x.arc(960+r*S(a=i/k*710),540+r*C(a),70,b=j-a+(frame%k%2),b)

Feb 28 2026 2:46 PM UTC

}// 130/140

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ximavus

function u(t) {

t?onmousemove=e=>P=e:P=0
for(X=96;X--;)for(Y=55;Y--;x.fillStyle=`hsl(${X*Y|(P.x+X)^(P.y+Y)|Y*X} 99%50%`)x.fillRect(X*20,Y*20,20,20)

Feb 20 2026 10:21 PM UTC

}// 131/140

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Multiplication mask

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ximavus

function u(t) {

t=~~(t*3)
F=(X,Y)=>~~((X&Y)/t)*t
for(X=96;X--;)for(Y=55;Y--;x.fillStyle=`hsl(${F(X,Y)*4} 99%50%)`)x.fillRect(X*20,Y*20,20,20)

Feb 12 2026 1:24 PM UTC

}// 125/140

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The de-sierpinsky-inator!

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rodrigo.siqueira

remix of d/34851 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=9e3;i--;x.fillRect(940+X*25,540-Y*35,t<2.5,.1))
F=0+i%(1+30/(t)),X=2*F*S(k=i),Y=F*C(i)/1-9/(F-3.4)

Jan 28 2026 7:01 PM UTC

}// 136/140

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Hazardous hole

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rodrigo.siqueira

remix of d/34849 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert('
for(i=3e4;i--;x.fillRect(940+X*15,Y*62,t<2.2,.1))F=i%(9+9/t),X=4*F*S(k=i%7?i*i:~(i/t)%44),Y=F*C(k)/2+20/F-F+i%2*F+5

Jan 28 2026 2:02 PM UTC

}// 140/140

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Recursive space time #spacetime

u/cantelope

iterative maybe. not seeing any recursion. looks cool tho!

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DazeWare

remix of d/34837 by u/DazeWare

function u(t) {

for(y=n=2e3,f=_=>(_%=99)<45?_:96-_;y--;x.fillRect(0,y^16,n,1))x.fillStyle=`hsl(${t*26} 90%${1*f(t*96+2*f(y/12)*T(t))}`

Jan 23 2026 10:01 PM UTC

}// 118/140

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marquisdegeek

function u(t) {

eval(unescape(escape`󤼽󝬴󛍗󟜲󝜶󒭦󫽲󚍩󟜶󩜳󞼡󭌦󙭩󛜭󞼩󭽩󭍨󚍸󚝳󨝶󩜨󣌽󫍩󫭥󥍯󛭢󪝮󩌨󮌩󚜬󭍲󨝮󬽬󨝴󩜨󪜥󥼪󤼬󪜯󥼪󤼩󛍲󫽴󨝴󩜨󚌨󣝡󭍨󛭲󨝮󩍯󫜨󚜪󝌩󯌰󚜪󜜮󝜷󚜬󨭥󩽩󫭐󨝴󪌨󫍩󫭥󥽩󩍴󪌽󞌩󛍌󚍓󛌰󚜬󣌨󤼯󜬬󤼯󜬩󛍌󚌰󛍓󛼲󚜬󣌨󤼬󤼩󛍲󩝳󭍯󬭥󚍳󭍲󫽫󩜨󚜩`.replace(/u../g,'')))

Jan 21 2026 4:23 PM UTC

}// 139/140

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An attempt at Truchet’s Tiles, but with vector graphics

u/Axioplase

Attacked by a swarm of ninjas...
u/ximavus

This reminded me of a book I have named "The black art of 3D game programming" and it does cover vector graphics. Its also from 1995 so its DOS programming

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rodrigo.siqueira

remix of d/34778 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia()'
for(i=1e4;i--;x.fillRect(960+X*54,540-Y*54,t<2,.1))
F=i%(4+2/t),X=F*S(k=i/t)-4*S(w=k/4),Y=F*C(k)+4*C(w)

Jan 20 2026 1:02 PM UTC

}// 136/140

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Concentric Loop 5