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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Agnes

remix of d/36414 by u/BriSeven

function u(t) {

with(x)for(c.width|=i=3;i--;fillText([...'🤚🍊🤚'][i],99,0))save(restore(font='39em"')),translate(99*C(a=3*t+7*i),900+99*S(a)),rotate(S(a*3)/9)

Oct 5 2026 9:09 AM UTC

}// 140/140

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Proper orange pre-peeling technique

u/cantelope

o.O

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PotatoImaginator

function u(t) {

c.width|=0
x.fillRect(760,340,400,400)
x.fillStyle='red'
x.fillRect(760+(k=200)*[a=t%1,1,b=1-t%1,0][d=t%4|0],340+k*[0,a,1,b][d],k,k)

Oct 5 2026 3:40 PM UTC

}// 132/140

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#square moving inside another square

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taupelink

remix of d/36411 by u/taupelink

function u(t) {

eval(unescape(escape`昽⡵Ɱ㴲⤽㹮㽍慴栮浡砨渪昨甭㈪眬渭ㄩⱮ⭦⡵⵩Ɱⴱ⤬昨㐪眬渭ㄩ⽮⤺㌲⩓⡵⤪⨲㭦潲⡩㴳攴㭩ⴭ㭸⹦楬汒散琨㤶〫爪䌨椩ⰵ㐰⭲⩓⡩⤬眽㌪琪⨨⸵⭴⨪⵴⼴⤬昨眫㘪椩⭦⡷ⴴ⩩⤦㈴㼰㩷⤩爽㤰⬱㠰⩴`.replace(/u([^D].)/g,'$1%')))

Oct 5 2026 12:45 AM UTC

}// 140/140

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d/36416

u/taupelink

NB These may look a little better on iOS/Safari than on Windows/Chrome.

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UEZ

function u(t) {

eval(unescape(escape`󩭯󬬨󮬽󜼱󞽺󟬮󝜻󮬪󟜮󞜸󚝦󫽲󚍩󟜳󜬰󞽩󛜭󞼩󪌽󤼨󭼽󚍘󟜨󪜭󜜶󜌩󚭺󛼹󞜩󚽓󚌨󦬽󮬫󭌪󜼩󛼴󚜪󜬩󚽃󚍘󛼷󚽚󛼹󚜯󜬬󮌮󩭩󫍬󤽴󮝬󩜽󮬼󜼱󟽠󪍳󫌨󜼵󛌶󜌥󛌤󮼲󝜫󮬪󜬫󚍃󚍷󚜾󜌩󚬲󝝽󙜩󨌺󙼣󞍣󩬧󛍸󛭦󪝬󫍒󩝣󭌨󪜪󝬬󮬼󜼱󙬦󜼵󜌫󚌳󛝨󚜪󜼰󜌯󮬬󝬬󜝥󜼩`.replace(/u../g,'')))

Oct 3 2026 11:01 AM UTC

}// 140/140

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Sahara Dunes

u/cantelope

ooooh

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rodrigo.siqueira

remix of d/36398 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=1e4;i--;x.fillRect(C(K=T(i/t/9)+a*90)*990*a+960,540+S(K)*990*a,t<2,T(a*a/6+5.3)%.2))a=i*i/t%3-2

Oct 4 2026 8:53 PM UTC

}// 126/140

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Ripple layers

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BriSeven

remix of d/18143 by u/KilledByAPixel

function u(t) {

with(x)for(c.width|=i=3;i--;fillText([...'🤚🍿🤚'][i],99,0))save(restore(font='39em"')),translate(99*C(a=t+8*i),900+99*S(a)),rotate(0+S(a*3)/9)

Oct 4 2026 12:01 PM UTC

}// 140/140

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Just gonna sit back and watch the show

u/cantelope

hahahah

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rodrigo.siqueira

remix of d/36400 by u/UEZ

function u(t) {

for(z=18;z-=.25;)for(i=214;i--;x.fillRect(i*9,2e3/z+h*(h)*400/z,9,1e3))h=S(X=i*z/99-z)+C(Z=z+t*5)+C(X*2+Z),x.fillStyle=`hsl(15,70%,${z*7}%)`

Oct 2 2026 6:02 PM UTC

}// 140/140

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Flight over a folded surface

u/joeytwiddle

Beautiful! #landscape #desert

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rodrigo.siqueira

remix of d/36400 by u/UEZ

function u(t) {

for(W=2e3,z=28;z-=.5;)for(k=i=222;i--;x.fillRect(i*9,k+h*500/z+W/z-5/t,9,W,1))h=S(X=i*z/k-z)+C(z+t*2),x.fillStyle=`hsl(200,55%,${z*2-z/t}%)`

Oct 2 2026 5:28 PM UTC

}// 140/140

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Night blue sea #uncompressed

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jpthinker

function u(t) {

eval(unescape(escape`󮌮󩭩󫍬󤽴󮝬󩜽󘬣󜌰󜌢󒭸󛭦󪝬󫍒󩝣󭌨󜌬󜌬󭼽󜭥󜼬󭼩󒭦󫽲󚍫󟝩󟜹󞜻󪜭󛜻󮌮󨽬󩝡󬭒󩝣󭌨󭜬󭜪󭜥󜝥󜼬󞜬󞜩󚝸󛭦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󭬽󪜪󪜥󜜰󞌰󯜠󞜹󘌵󜍠󛍸󛭦󪝬󫍒󩝣󭌨󭜽󪜯󪼪󭼬󭬬󪼬󜜹󚜊󮌮󨭥󩽩󫭐󨝴󪌊󮌮󨝲󨼨󜬵󝜬󞌵󜌬󞜰󛌰󛌷󚜊󮌮󩭩󫍬󚌩`.replace(/u../g,'')))

Oct 4 2026 7:14 AM UTC

}// 139/140

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Rainbow Road

u/jpthinker

#static

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rodrigo.siqueira

remix of d/36415 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=1e4;i--;x.fillRect(C(K=T(i/t/9)+a*170)*3520*a+960,540+S(K+.3)*2600*a,t<2,T(a*a/6+5.3)%.19))a=i*i/t%.4

Oct 5 2026 8:07 PM UTC

}// 132/140

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Ripple spiral #spiral