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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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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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XOVT

remix of d/34694 by u/XOVT

function u(t) {

c.width|=0;for(i=2e3;i-=8;)x.fillRect(i,650+90*S(i/80+t),8,2);s=S(t*2);x.fillRect(500,620+90*S(t+6.25)-90*s*s,40,8)

Jan 9 2026 8:33 PM UTC

}// 115/140

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ximavus

remix of d/34595 by u/ximavus

function u(t) {

eval(unescape(escape`𫐽𬰽🡸𛡦𪑬𫁓𭁹𫁥👳𒡭𚁒𚀩𚐊𭀿𮀮𩡩𫁬𤡥𨱴𚁸𛡧𫁯𨡡𫁁𫁰𪁡🐮𜐬𜀬𜡥𜰬𜡥𜰩𞡦👛𧐊𫑠𘰰𜁦𩠰𜁠𒡦𛡰𭑳𪀨𦱍𨑴𪀮𬡡𫡤𫱭𚀩𚠲𩐳𛀰𧐩𒡦𫱲𚁩👦𛡬𩑮𩱴𪀻𪐭𛐻𮀮𩡯𫡴🐧𜡣𫐠𨐧𚑸𛡦𪑬𫁔𩑸𭀨𤰨𩡛𪑝𦰰𧐩🠰🰱𞠰𛁦𦱩𧑛𜁝𛁦𦱩𧑛𜑝𚰽𞐩`.replace(/u../g,'')))

Dec 28 2025 9:56 AM UTC

}// 140/140

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Matrix but not from temu this time

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ximavus

function u(t) {

x.fillRect(x.globalAlpha=.1,0,2e3,1080)
X=_=>S(i+t/i)
Y=_=>C(i+t)
for(i=5000;i--;)x.clearRect(960+X()*960,540+Y()*540,9,9)

Dec 20 2025 10:01 AM UTC

}// 122/140

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Black hole

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ximavus

function u(t) {

x.fillRect(x.globalAlpha=.001/t,0,2e3,1080)
for(i=2e3;i--;)x.clearRect(i,C(t+i)**S(t+i)*t,9,9)

Dec 14 2025 7:27 PM UTC

}// 94/140

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Demonstration of a bug I found with x.globalAlpha. Breaking the .001961 limit. As long as it is more than .001961 at some point if will be valid

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ximavus

function u(t) {

eval(unescape(escape`𮀮𬡥𬱥𭀨𨠽𙱂𨑣𪱳𬁡𨱥𙰬𭀿𫱮𪱥𮑤𫱷𫠽𪰽🡻𫀽𪰮𪱥𮐻𘑬𦰱𧑼𫀽👢🱬🐽𨠿𬰽𬰮𬱬𪑣𩐨𜀬𛐱𚐺𬰫👬𞠰𯐺𬰽𙰧𚐻𩡯𬠨𪐽𬰮𫁥𫡧𭁨𞱩𛐭𞰩𩡯𬠨𪠽𝰻𪠭𛐻𚑳𛡣𪁡𬡃𫱤𩑁𭀨𪐩𙠱🀼𪠿𮀮𩡩𫁬𤡥𨱴𚁩𚠵𜀬𪠪𝐰𛀵𜀬𝐰𚐺𜀻`.replace(/u../g,'')))

Dec 4 2025 7:03 PM UTC

}// 131/140

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Binary text editor

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rodrigo.siqueira

remix of d/34568 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(𝕏=X=Y=t,i=3e4;i--;𝕏=X,x.fillRect(Y*3e3+1150,X*2e3-520,t<3,.1))X=(X*X-Y*Y/3)%9+.29,Y=C(2*𝕏*Y+8)+i%3/30

Dec 2 2025 1:46 PM UTC

}// 137/140

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Soft thorns

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lewdev

remix of d/34552 by u/ximavus

function u(t) {

eval(unescape(escape`琿砮牥獥琨潮步祵瀽欽㹻搽欮步祃潤攻搽㴸㽳㵳⹳汩捥⠰Ⱝㄩ㩤㴽ㄳ㽳⬽≜渢㩤㸳ㄿ猫㵫⹫敹㨰紩㩳㴧屮✊景爨栽献獰汩瑠屮怬椽栮汥湧瑨ⱸ⹦潮琽✲捭∧㭩ⴭ㬩砮晩汬呥硴⡨孩崬〬㘰⩩⤠`.replace(/u([^D].)/g,'$1%')))

Nov 25 2025 7:09 PM UTC

}// 134/140

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u/ximavus canvas text editor

u/ximavus

Congrats dude!
u/lewdev

Hehe, thanks, but I had to compress it.

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cantelope

remix of d/34552 by u/ximavus

function u(t) {

c.parentNode.innerText=`Challenge! Make the code in the comments to 140b
(I tried)`

Nov 24 2025 6:40 PM UTC

}// 84/140

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u/lewdev

t?0:c.before(`Challenge! Make the code in the comments to 140b (I tried)`)
u/ximavus

nice!

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tactical_retard

function u(t) {

p=3.14
for(i=5e4;i--;x.fillRect(960+w*C(m*2)*.56/e*960,540+(q*S(m)+.4)/e*540,1,.01/e))q=i%50/98-.25,P=i/5e4,w=1+q*C(m=P*p),e=w*S(m*2)+1.7

Nov 21 2025 3:32 AM UTC

}// 137/140

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3d mobius strip. Adjust 1.7 for the Z and .4 for the Y #d3 #mobius