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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/34866 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert('
for(i=2e4;i--;x.fillRect(940+X*15,480-Y*62,t<2,.1))F=i%(2+15/t),X=4*F*T(k=i%7?i*t:~(i/t)%44),Y=F*C(k)/2-1/F

Feb 7 2026 7:54 PM UTC

}// 132/140

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Distorted tron space

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ximavus

function u(t) {

t?onclick=_=>x.lineTo(_.x,_.y):c.width=568
onkeydown=_=>_.key[1]=='n'?x.reset():x.beginPath()
x.stroke()

Jan 25 2026 11:40 AM UTC

}// 104/140

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Vertice drawing

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DazeWare

remix of d/34837 by u/DazeWare

function u(t) {

for(y=n=2e3,f=_=>(_%=96)<45?_:96-_;y--;x.fillRect(0,y^t,n,1))x.fillStyle=`hsl(${t*26} 90%${1*f(t*96+2*f(y/6))/Math.random()}`

Jan 23 2026 9:55 PM UTC

}// 125/140

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DazeWare

remix of d/34835 by u/DazeWare

function u(t) {

for(i=1e4;i--;x.fillRect(960+X*60,610-Y*70,t<2,.1))
F=i%(4+6/t),X=F*S(k=i/t)-1*S(w=k/9),Y=F*T(k)+1*C(w)

Jan 23 2026 9:35 PM UTC

}// 103/140

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DazeWare

remix of d/34778 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia()'
for(i=1e4;i--;x.fillRect(960+X*60,610-Y*70,t<2,.1))
F=i%(4+6/t),X=F*S(k=i/t)-4*S(w=k/9),Y=F*T(k)+3*C(w)

Jan 23 2026 9:34 PM UTC

}// 136/140

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Axioplase

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󜭥󜼬󬜽󜼰󞽦󫽲󚍪󟜵󜌻󪬭󛜻󚜊󩭯󬬨󪜽󞜰󞽩󛜭󞼩󮌮󩭩󫍬󤽴󮝬󩜽󤬨󪜾󬜿󨜽󜬴󝜺󜌬󪜾󬜦󙭩󟌶󜌿󨜺󜌬󪜼󝬰󟽡󞬰󛌮󜬩󛍸󛭦󪝬󫍒󩝣󭌨󝬰󜌫󪜪󚌹󚽓󚍪󛼱󝜭󭌩󚜬󜬰󜌫󪬪󜜰󚽩󚭃󚍩󛼹󛝴󚜬󬜬󬜩`.replace(/u../g,'')))

Jan 20 2026 3:37 AM UTC

}// 120/140

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#flag #france

u/Axioplase

I'm sure it can be done without compression or with the pole... (and with the correct colours...)

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codezmr

function u(t) {

for(c.width|=0,i=12;i--;x.fillText("CODEZMR",960+S(t+i)*800,540+S(t*1.4+i)*400))x.font="9em s",x.fillStyle=R(i*20,255-i*10,255,.5)

Jan 16 2026 2:46 PM UTC

}// 130/140

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neimad

remix of d/34733 by u/DazeWare

function u(t) {

c.width=w=99
for(i=w*33;i--;x.fillRect(i%w,i/w*2,1,9))f=i%w+999*S(t*.05),n=T(0|(i/w+f^f-i/w)/(t*.7+6)),x.fillStyle=`hsl(${(i)/t*n},99%,50%`

Jan 15 2026 3:53 AM UTC

}// 139/140

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u/ximavus

dude this is amazing!

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ximavus

function u(t) {

for(x.reset(i=1e3);i--;)x.fillRect(960+S(t-i+C(t-i)*3)*960,540+C(t+i+S(t+i)*3)*540,20,20)

Jan 13 2026 8:03 PM UTC

}// 89/140

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Spirals

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rodrigo.siqueira

remix of d/34722 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()`
for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(2e3+Y*1700,360-X*1e3,t<1,.1))X=S(X*X-Y*Y*.6),Y=C(2*𝕏*Y+2.1)-T(i-t)/(i%19+1)/8

Jan 12 2026 2:35 AM UTC

}// 138/140

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Metamorphosis