Dwitter - javascript demos in 140 characters

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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UEZ

remix of d/36507 by u/UEZ

function u(t) {

eval(unescape(escape`󦌽󩬽󨼽󟭓󚍍󨝴󪌮󭍡󫭨󚍓󚍣󚬨󩌽󬬾󜝼󦜼󛜮󝭼󯍲󛜲󚽓󚍫󚜩󚬳󚜪󜬩󚜬󦜽󭌯󞌭󜜮󜬵󞽦󫽲󚍩󟜲󩜳󞽩󛜭󞼩󪼽󦌯󚌱󛝙󚜪󝜫󚍱󟝙󟌭󛬳󚜪󞝼󜌬󬬽󚍘󛼨󬜿󚍙󚼮󞜩󚬲󞬨󜜭󦜩󛼱󛬱󚜩󚬪󜬬󮌮󩭩󫍬󤭥󨽴󚍩󛍴󚬶󜌬󚌱󚽦󚍘󟝩󛼴󞌰󛜲󚜪󩬨󦜩󚜯󜬪󚍤󟌱󟼱󛝲󞬱󚜬󜼩`.replace(/u../g,'')))

Oct 16 2026 10:33 PM UTC

}// 140/140

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#Glass #Diamond #Raytracing

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UEZ

remix of d/27094 by u/danny@hille.dk

function u(t) {

eval(unescape(escape`󦌽󩬽󨼽󟭓󚍔󚍣󚬨󩌽󬬾󜝼󯍲󛜱󛬵󚜪󝬩󚜬󦜽󭌯󞌭󜜮󜜲󞽦󫽲󚍩󟜲󩜳󞽩󛜭󞼩󬬽󚍘󚭘󚽙󚭙󛜱󚜪󚬲󚬵󛍸󛭦󪝬󫍒󩝣󭌨󪜬󭌪󝬰󛌨󭼽󚌭󜜫󩬨󦌽󪜯󝌸󜌭󜬩󚭦󚍙󚜩󛼲󛬵󛍤󟬰󟽷󞬨󭼪󝬮󞜫󜜩󚬨󬬼󛬱󝌦󦜼󛜮󜜳󟽲󚬷󚼮󜌵󞬮󞜩󚜬󜼩`.replace(/u../g,'')))

Oct 16 2026 9:40 PM UTC

}// 128/140

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Dark #Ring - #Raytraced

u/UEZ

#slowdraw #waitforit
u/UEZ

#glass

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UEZ

function u(t) {

eval(unescape(escape`󩭯󬬨󨼮󭽩󩍴󪌽󦌽󜜶󜌬󮌮󩭩󫍬󤭥󨽴󚍙󟜰󛌰󛍘󛍘󚜻󦜼󞜰󞽙󚼫󚝙󟌴󝜿󮌮󩭩󫍬󤭥󨽴󚌰󛍙󛍘󛌱󛍸󛭦󪝬󫍓󭍹󫍥󟝒󚍙󚬶󛍙󚬴󛌱󝬰󛝙󚜩󞭸󛭤󬭡󭽉󫝡󩽥󚍣󛌰󛌸󞜭󦜬󦌬󜜬󤼨󦜪󦜭󭌪󞜩󚭘󛽙󛍙󛍘󛌮󝬬󦜭󝌵󯍼󮌮󩭩󫍬󥍥󮍴󚍵󛍘󛝴󚬳󜬥󜜹󜌰󛌲󝬫󤼨󭌩󚬱󝌩󚜻`.replace(/u../g,'')))

Oct 15 2026 6:05 PM UTC

}// 140/140

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#Oldschool Demo #Scroller

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danny@hille.dk

remix of d/36507 by u/UEZ

function u(t) {

X=f=c=>S(Math.hypot(c*(d=r>1||r)*8)),Y=t/7-1.3;for(i=2e3;i--;)r=(X*X+Y*Y-1)**2*6,x.fillRect(i,t*60,(w=(-.01+f(X=i/480-2)*f(Y)),w),3)

Oct 16 2026 11:21 PM UTC

}// 132/140

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#Chrome #Ring remix

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UEZ

function u(t) {

eval(unescape(escape`󩭯󬬨󦌽󜬴󜌻󦌭󛜻󚝦󫽲󚍙󟜱󜼵󞽙󛜭󞽸󛭦󪝬󫍒󩝣󭌨󦌪󞌬󦜪󞌬󞌬󞌬󮌮󩭩󫍬󤽴󮝬󩜽󤬨󭬬󭬬󭬫󜼰󛌮󞜩󚜩󩭯󬬨󩌽󜌻󩌼󜬰󞽤󚼽󬼪󬼼󜝥󛜴󟼹󞜺󬼩󬼽󚌨󚍘󚭤󛼲󝼰󚽴󚜥󜬭󜜩󚬪󜬫󚍙󚭤󛼲󝼰󙜲󛜱󚜪󚬲󚼨󩼽󚍤󚽴󚬲󚜥󜬭󜜩󚬪󜬩󚬪󛬵󛜮󝬬󭬽󚍤󛜲󜌩󚭧󚬲󝼻`.replace(/u../g,'')))

Oct 15 2026 2:31 PM UTC

}// 139/140

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#Sphere Field

u/DaSpider

Next level demoscene
u/Xen

slight golf: for(z=X=270;X--;)for(Y=z;Y--;x.fillRect(X*8,Y*8,9,9,x.fillStyle=R(v,v*2)))for(d=0;d<20;d+=s*s<1e-4?99:s)s=(((X*d/z+t)%2-1)**2+(Y*d/z%2-1)**2+(g=(d+t*2)%2-1)**2)**.5-.6,v=(d-20)*g*7

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taupelink

remix of d/36503 by u/taupelink

function u(t) {

with(x)for(i=455;i--;fill(lineTo(X,Y)))beginPath(globalAlpha=S(j=71*i)**12/15),arc(X=i%33*60,Y=i%19*60,i%16.5&i%7&4?0:240/80**t,j/=.4,j-1.6)

Oct 16 2026 11:37 PM UTC

}// 140/140

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d/36510

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taupelink

remix of d/36498 by u/taupelink

function u(t) {

with(x)for(i=364;i--;fill(lineTo(X,Y)))beginPath(globalAlpha=S(j=71*i)**24/9),arc(X=i%13*160,Y=i%7*180,i%26+i%63&8?0:240/99**t,j*=7.5,j-1.6)

Oct 15 2026 9:16 PM UTC

}// 140/140

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d/36503

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UEZ

function u(t) {

eval(unescape(escape`󩭯󬬨󭼽󨼮󭽩󩍴󪌦󟝩󟜱󜌳󝬸󛍄󟜰󞽩󞽄󚼽󛬰󝜩󦌽󚍩󙝷󛼳󜬭󜬩󚭄󚼹󞜮󞌬󦜽󚍩󛼸󩜳󛜮󝜩󚭄󛍚󟜨󡌫󭌩󚬲󛌨󡌾󞝼󦌥󜜼󛬷󙭚󙜱󟌮󝼦󦜾󛬷󛝓󚌨󦍼󜌩󚬹󚽚󯌰󚜪󛬵󚜦󙭸󛭦󪝬󫍒󩝣󭌨󛜭󪜥󭼬󪜾󟬷󛍄󟌹󙭚󙜱󟌮󜜦󦜪󜼰󙭘󚬸󙬱󟼮󜬺󡌾󞝼󯌮󞌸󛌱󛍄󟜭󭌥󛬰󝜩`.replace(/u../g,'')))

Oct 16 2026 8:49 AM UTC

}// 139/140

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Flying over a city at night - #Slow

u/UEZ

#slowdraw

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PotatoImaginator

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁦𪑬𫁓𭁹𫁥🐧𘱣𜁦𙰬𩡩𫁬𤡥𨱴𚀰𛀰𛀲𩐳𛀲𩐳𚐬𩡩𫁬𤱴𮑬𩐽𙰣𝠰𞐧𒠬𪐽𝠲𞱩𛐭𞰩𩡩𫁬𤡥𨱴𚁡🐹𜐰𚰴𜀰𚡃𚁪👩𛰲𜀩𛁢🐶𝀰𚰨𤰨𪠩𛐮𝐩𚠳𜀰𚡃𚁴𚐬𞐹𛀹𞐩𛁦𪑬𫁒𩑣𭀨𝀸𜀫𨐯𜠬𝐸𝐭𨠯𜠬𝐰𛀵𜀩`.replace(/u../g,'')))

Oct 17 2026 3:54 PM UTC

}// 128/140

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Happy Sad #monster

u/cantelope

such a mystery
u/cantelope

relevant: https://srmcgann.github.io/generative1/emerge (click for audio)

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UEZ

remix of d/36506 by u/UEZ

function u(t) {

eval(unescape(escape`堽昽挽㹓⡍慴栮瑡湨⡣⨨搽爾ㅼ籲ⴱ⸵⤪㘩⤬夽琯㠭ㄮㄲ㭦潲⡩㴲攳㭩ⴭ㬩爽⡘⩘⭙⩙ⴱ⤪⨲⨵ⱸ⹦楬汒散琨椬琪㘰Ⱘ眽⠭ㄫ昨堽椯㐸〭㈩⩦⡙⤩⼲⸵Ɽ㸰㽷㨨眪㘮㤫ㄩ⨨爼⸱㐦夼⴮ㄳ㽲⨷⬮〵㨮㤩⤬㌩`.replace(/u([^D].)/g,'$1%')))

Oct 16 2026 9:59 PM UTC

}// 140/140

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#Glas #Ring #Raytraced

u/UEZ

#slowdraw #waitforit
u/UEZ

#glass