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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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tzador

remix of d/33270 by u/gabornyeki

function u(t) {

eval(unescape(escape`𘁣𛡷𪑤𭁨𯀽𜀊𮀮𩡯𫡴🐢𜐰𜁰𮀠𧰢𒡡👣𛡡🰿👛𧐊𭀪🐲𒡡𦱪👴𙐳𜡼𜁝𚰽𛠰𜀵𛰳𚠲𒡦𫱲𚁩🐰𞱩🀳𜠻𪐫𚰩𒡸𛡦𪑬𫁓𭁹𫁥👒𚁪🐽𪐿𜠵𝐺𜀩𛀊𨑛𪑝𯁼👩𚠮𜐹𞐬𮀮𨡥𩱩𫡐𨑴𪀨𚐬𮀮𨑲𨰨𞐶𜀫𤰨𨑛𪑝𚐪𜰰𜀬𝠰𜀫𠰨𨑛𪑝𚐪𜰰𜀬𜐵𛀰𛀷𚐬𮀮𩡩𫁬𚀩`.replace(/u../g,'')))

Feb 9 2025 2:12 PM UTC

}// 140/140

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tzador

function u(t) {

eval(unescape(escape`𘁣𛡷𪑤𭁨𯀽𩠽𚁡𚐽🡃𚁡𚐪𚠲𚠲𝐶𒡷𪑴𪀨𮀩𩡯𬠨𪐽𝀲𞱁🐮𜐵𚡩𚱴𛁐👓𚁁𚐫𜠬𤐽𤰨𠐫𜰩𚰲𛁳𭁲𫱫𩑓𭁹𫁥👒𚁦𚁁𚐬𩠨𠐫𞐩𚐬𪐭𛐻𚑢𩑧𪑮𤁡𭁨𚁬𪑮𩑔𫰨𞐶𜀫𞑥𜰪𠰨𠐫𜰩𛱑𛀵𝀰𛐷𩐳𛱑𛁬𪑮𩑔𫰨𞐶𜀫𞑥𜰪𠰨𠐩𛱐𛀵𝀰𚰷𩐳𛱐𚐩𛁳𭁲𫱫𩐨𚐩`.replace(/u../g,'')))

Feb 9 2025 1:45 PM UTC

}// 140/140

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tzador

function u(t) {

c.width |= 0
for(N=1e4,i=N*4;X=(S(i*N)*N+S(t)*2)%9-4,Y=(C(i*N)*N)%9-4,Z=2-1.5/(1+X*X+Y*Y),i--;)x.fillRect(960+X*500/Z,540+Y*555/Z,9/Z,9/Z)

Feb 8 2025 4:33 PM UTC

}// 138/140

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Blub

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rodrigo.siqueira

remix of d/34863 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert('
for(i=3e4;i--;x.fillRect(940+X*15,300-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+F-i%2*F-5

Feb 6 2026 1:29 PM UTC

}// 140/140

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the target

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rodrigo.siqueira

remix of d/34863 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=1e4;i--;x.fillRect(700+X*30,420-Y*70,t<2,.1))F=i%(30/t),
X=F*S(k=i/t)-F*S(K=k/2),Y=-F*C(K)

Feb 5 2026 2:00 PM UTC

}// 128/140

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Antenna #antenna

u/cantelope

these just get better and better :D

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rodrigo.siqueira

remix of d/34862 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=1e4;i--;x.fillRect(960+X*65,740-Y*60,t<2,.1))F=i%(+12/t),
X=F*S(k=i/t)-F*S(K=k/3)*2,Y=F*C(K)

Feb 4 2026 6:45 PM UTC

}// 130/140

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Precision Needle

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rodrigo.siqueira

remix of d/34847 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia(.6)'
for(i=3e4;i--;x.fillRect(960+X*15,180-Y*70,t<4,.1))
F=i/690,X=4*F*S(k=T((t+1)*i/6%49)),Y=F*C(k)/2-25/F

Jan 31 2026 1:53 PM UTC

}// 137/140

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Funnel fibers

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rodrigo.siqueira

remix of d/34789 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=1e4;i--;x.fillRect(960+X*65,750-Y*60,t<2.5,.1))F=i%(4+9/t),X=F*S(k=i/t)-4*S(k*2),Y=F*C(k)

Jan 22 2026 1:41 PM UTC

}// 127/140

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Concentric volumetric triangle

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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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DaSpider

function u(t) {

eq="x**4-4*x-99"
t?1:(x=9e9,i=-5e8)
f=(x)=>eval(eq)
if(f(x+i)>0)x+=i;else i/=10
throw "x ≈ "+x+"\n"+eq+" = "+f(x)+"\nerr = "+i

Jan 20 2026 3:56 AM UTC

}// 126/140

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Brutre force solver for eq=0, any equation in JS/Math. format with real solutions

u/DaSpider

For other solutions, switch signals on x andi/change initial value, etc. Based on a classroom example of "loops" t.co/ADQm7hLeCD