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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/34549 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(2300+Y*2500,99-X*2400,t<1,.1))
X=S(X*X)-S(Y*Y),Y=C(2*𝕏*Y+1.91)-T(i-t)/900

Nov 24 2025 5:33 AM UTC

}// 140/140

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Double interaction

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮁛𫰽𙱦𪑬𫁒𩑣𭀧𧐨𜀬𜀬𭰽𨰮𭱩𩁴𪀽𝠰𜀬𭰩𛁙🐹𜐻𦐭𛐻𚑦𫱲𚁘🐱𝐰𞱘𛐭𞱸𛡦𪑬𫁓𭁹𫁥👒𚁷𛀰𛁤𚠴𜀬𛠲𚐬𮁛𫱝𚀨𦀪𝀫𩰪𩀩𚡥𚱘𚠴𚠨𩠽𜐭𩐩𛀨𦐪𝀫𪀪𩀩𚡥𚱙𚠴𚡦𛐹𛀶𛀶𚐩𩀽𠰨𣑡𭁨𛡨𮑰𫱴𚁧👘𛐷𝀬𪀽𦐭𝀵𚐯𞀪𚁥👓𚁴𛰶𚐩𛑴𚐪𜰻`.replace(/u../g,'')))

Nov 24 2025 12:44 AM UTC

}// 140/140

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ximavus

function u(t) {

s=`Challenge! Make the code in the comments to 140b
(I tried)`
x.font='2cm a'
h=s.split('\n')
for(i=h.length;i--;)x.fillText(h[i],0,i*60+60)

Nov 23 2025 5:06 PM UTC

}// 140/140

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I tried to make the code to 140b. I couldn't so I figured out to give it to do it

u/ximavus

t<1?s='\n':b='Backspace' e='Enter' x.reset() onkeydown=k=>{o=k.key;l=o.length<2|o==b|o==e?k.key.replace(e,'\n'):'';l!=b?s+=l:s=s.slice(0,-1)} x.font='2cm a' h=s.split('\n') for(i=h.length;i--;)x.fillText(h[i],0,60*i)
u/ximavus

the code I posted is like a text editor. Maybe someone of you watching this can make it run! Congratulations to the one who does it (if possible)

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eftk0

remix of d/34499 by u/buddybearalex

function u(t) {

x.globalCompositeOperation="xor";if(t<1e-9){a=c.height;b=25};x.drawImage(c,1,1);x.fillRect(0,0,5+a,5+a);a+=-1;b+=1

Nov 23 2025 2:09 PM UTC

}// 114/140

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wtf did i just make

u/ximavus

wow!
u/cantelope

neat

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KilledByAPixel

function u(t) {

for(c.width|=i=14;i--;x.beginPath(x.fill(x.arc(540+b*840+S(a=i/.955)*d,540+C(a)*d,i%7?d**1.5*.025:99,0,9))))d=i%7&&C(t+22*(b=i<7))*90+260

Nov 22 2025 6:11 PM UTC

}// 137/140

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Ebbinghaus Illusion ⚫⚫ Center circles are the same size

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rodrigo.siqueira

remix of d/34548 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*2e3+410,X*1600-310,t<2,.1))
X=(X*X-Y*Y*.4)%5+.326,Y=C(2*𝕏*Y+1)-.15

Nov 22 2025 5:39 PM UTC

}// 138/140

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Microscopic bugs

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rodrigo.siqueira

remix of d/34543 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert(`:𝕏=X=Y=0
for(i=3e4;i--;𝕏=X,x.fillRect(Y*3e3+1100,X*2e3-540,t<3,.1))X=(X*X-Y*Y*.39)%1+.28,Y=C(2*𝕏*Y+1.92)+1/4

Nov 21 2025 7:57 PM UTC

}// 134/140

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Organic gear attractor

u/ximavus

oh my goodness. its amazing!

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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

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dee-gomma

remix of d/34544 by u/dee-gomma

function u(t) {

with(x)for(t%=5,c.width|=a=t<2,scale(99,99),i=9;i--;fill(arc(p=t*9-16,5,4,s=S(p)**2,-s,moveTo(p,5))))fillRect(i+2+T(1.5+t*1.5%3)**2,4,a/2,2)

Nov 20 2025 6:42 PM UTC

}// 140/140

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#default fleeing from a big monster (#uncompressed)

u/ximavus

pacman!

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dee-gomma

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁴𙐽𝀬𨰮𭱩𩁴𪁼🐰𛁳𨱡𫁥𚀹𞐬𞐹𚐬𨠽𭀼𜠦𙡔𚁡🐱𛠵𚱴𚠱𛠵𚐪𚠲𛁩🐹𞱩𛐭𞱩𯁼𩡩𫁬𚁡𬡣𚁰👴𚠱𜰭𜠳𛀵𛀴𛁳👓𚁰𚐪𚠲𛀭𬰬𫑯𭡥𥁯𚁰𛀵𚐬𩡩𫁬𤱴𮑬𩐽𙰣𩡤𜀧𚐩𚑦𪑬𫁒𩑣𭀨𪐪𚀱𚱓𚁡𚐪𚠲𛰳𚐫𜠫𨠫𤰨𜐯𨠩𛰸𛀴𛀮𝐬𜠩`.replace(/u../g,'')))

Nov 20 2025 6:41 PM UTC

}// 137/140

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#default fleeing from a big monster

u/joeytwiddle

Nice shiver :-)
u/ximavus

pacman in color yay!
u/ximavus

that shake is like #default being scared