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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rodrigo.siqueira

remix of d/36258 by u/taupelink

function u(t) {

for(i=1200;i--;x[i%223?'stroke':'fill']())x.beginPath(x.strokeStyle=R(i,i/4,9,.7)),x[i<650?'arc':'rect'](i*(i-t)%2200,i*i%1800-i,i,i,i+7)

Sep 8 2026 11:22 PM UTC

}// 137/140

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rodrigo.siqueira

remix of d/36270 by u/cantelope

function u(t) {

for(i=6e4;i--;x.fillRect(i%320*6,i/54-5,6,7))a=i%320/31-5,b=i/9e3-3,d=30/(S(a*a-b*b-t*9)*S(a*b)-S(7*a)*S(7*b))**-6,x.fillStyle=R(d,d/4)

Sep 10 2026 9:48 PM UTC

}// 135/140

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Blinking effect

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rodrigo.siqueira

remix of d/36269 by u/rodrigo.siqueira

function u(t) {

for(i=990;i--;x[i%99?'stroke':'fill']())x.beginPath(x.strokeStyle=R(0,i/3,i,.1)),x.arc(i*(C(i+t))%299+960,i+i*S(i)*C(-t*i),9/t/t,0,8)

Sep 10 2026 4:43 AM UTC

}// 133/140

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A Possible Sign of Life

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rodrigo.siqueira

remix of d/36258 by u/taupelink

function u(t) {

for(i=1200;i--;x[i%223?'stroke':'fill']())x.beginPath(x.strokeStyle=R(0,i/4,i*i,.1)),x['arc'](6*i*(C(i+t/2))%2000,i*C(t*3-i)+200,12/t/t,0,7)

Sep 9 2026 2:04 PM UTC

}// 140/140

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Underwater Garden

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magna

remix of d/36264 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`󩭯󬬨󪜽󜜲󜌰󞽩󛜭󞽸󦽩󙜲󜬳󟼧󬽴󬭯󪽥󙼺󙽦󪝬󫌧󧜨󚜩󮌮󨭥󩽩󫭐󨝴󪌨󮌮󬽴󬭯󪽥󤽴󮝬󩜽󤬨󪜬󪜯󝌬󞜬󛬷󚜩󛍸󦽩󟌶󝜰󟼧󨝲󨼧󞬧󬭥󨽴󙽝󚍩󚬨󪜭󭌩󙜲󜬰󜌬󪜪󪜥󜜸󜌰󛝩󛍩󛍩󛍩󚼷󚜊󩭯󬬨󪜽󞜻󪜭󛜻󚝸󛭣󫍥󨝲󤭥󨽴󚌴󜌰󚽩󚬱󜌰󚽓󚍴󚜪󜼰󜌬󝌰󜌬󝜰󛌲󜌰󚜻`.replace(/u../g,'')))

Sep 10 2026 3:22 AM UTC

}// 140/140

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Obligatory #default remix

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cantelope

remix of d/36266 by u/Arn

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼🐰𛁩🐶𩐴𞱩𛐭𞰩𨐽𪐥𜰲𜀯𜰰𛐵𛠲𝐬𨠽𚁩𛰳𜠰𯀰𚐯𜰰𛐳𛁤🐶𛰨𛠰𜐫𚁓𚁡𚡡𛑢𚡢𛑴𚠱𝠩𚡓𚀲𚡡𚡢𚐭𤰨𝰪𨐩𚡓𚀷𚡢𚐩𚠪𜠩𛁸𛡦𪑬𫁓𭁹𫁥👒𚁤𚠲𛁤𛰲𚐬𮀮𩡩𫁬𤡥𨱴𚁩𙐳𜠰𚠶𛁩𛰳𜠰𚠶𛐵𛀶𛀷𚐻`.replace(/u../g,'')))

Sep 9 2026 10:26 PM UTC

}// 128/140

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mixy mixy

u/rodrigo.siqueira

Uncompressed to 140 chars: for(i=6e4;i--;x.fillRect(i%320*6,i/54,6,7))a=i%320/31-5,b=i/9e3-3,d=12/(.01+(S(a*a-b*b-t*9)*S(2*a*b)-S(7*a)*S(7*b))**2),x.fillStyle=R(d,d/4)

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taupelink

remix of d/36147 by u/taupelink

function u(t) {

eval(unescape(escape`昽甽㸨㐪䌨甯㐩⨪㈭㈩⨪㌭㠪䌨甯㌭眩㭦潲⡩㴱攴㭩ⴭ☦琼㠻砮晩汬剥捴⠹㘰⭲⩃⡩⤬㔴〫爪匨椩ⱷⱷ⤩爽琥㈪ㄸ〫ㄸ〬砮晩汬却祬攽刨漽ㄴ㐫㘪昨眽ㄫ㐪琪⨮㔩Ɐ⬽㠪昨眫㠪椩Ɐ⬽㘪昨眭㘪椩ⰲ⽯⽷⤠`.replace(/u([^D].)/g,'$1%')))

Sep 8 2026 9:15 PM UTC

}// 140/140

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d/36261

u/taupelink

Runtime approx 8 seconds

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taupelink

remix of d/36259 by u/taupelink

function u(t) {

eval(unescape(escape`景爨椽稽爽㙥㌻椭ⴻ砮晩汬剥捴⡩⼳ⰱ〸〭㈱㘪琬㌫琬稫㵳⽺⨪㑞礫㘪匨焩⤩礽爯稯㘬爽㔰〭⡺㴸⬶⩓⠨穞瑞⡳㵩⭲⤯㐸〩⼵⤩⩺ⱸ⹦楬汓瑹汥㵒⡲⼵⩴⵹⩃⡱㴨⡺☲⤭ㄩ⩩⽲⽺⼵⤬爯㑞㠪礬爯琬ㄯ礩`.replace(/u([^D].)/g,'$1%')))

Sep 8 2026 7:52 PM UTC

}// 139/140

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d/36260 Wall with window and dripping pink paint

u/taupelink

(Full disclosure: Window and dripping patterns were both happy accidents!)

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Axioplase

remix of d/36265 by u/Axioplase

function u(t) {

w=c.width=3e2;for(j=0;j<(h=500);j++)for(i=w;i--;)x.fillRect(i,j,d=u[j*w+i]=j?u[(j-1)*w+i]^u[(j-1)*w+(i+1)%w]:((t/99+99*S(i)**2)%1.2)|0,d)

Sep 9 2026 1:40 PM UTC

}// 137/140

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Flipping bits

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Arn

function u(t) {

eval(unescape(escape`景爨挮睩摴桼㴰Ⱪ㴵㜶〰㭩ⴭ㬩愽椥㌲〯㐰ⴴⱢ㴨椯㌲ぼ〩⼴〭㈮㈵Ɽ㴵⼨⸰ㄫ⡓⡡⩡ⵢ⩢⵴⼲⤪䌨㈪愪戩ⵃ⠷⩡⤪䌨㜪戩⤪⨲⤬砮晩汬却祬攽刨搪㈬搪搯㤹Ɽ⨴⤬砮晩汬剥捴⡩┳㈰⨶Ⱪ⼳㈰⨶ⰶⰷ⤠`.replace(/u(..)/g,'$1%')))

Sep 9 2026 1:19 PM UTC

}// 136/140

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Quantum lace

u/cantelope

awesome!