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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ximavus

function u(t) {

t?onmousemove=e=>{l=e;v.push([e.x,e.y])}:v=[]
c.width=568
for(a of v)x.lineTo(a[0]+=(a[0]-l.x)/99,a[1]+=(a[1]-l.y)/99)
x.stroke()

Mar 23 2026 3:10 PM UTC

}// 129/140

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Zoom drawing

u/Xen

this is sexy! :-O
u/cantelope

oooh neat

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ximavus

remix of d/35096 by u/dee-gomma

function u(t) {

c.width=240
c.style.filter='invert('
t?onkeydown=e=>{l=e.key;l[1]=='a'?s=s.slice(0,-1):l[1]?0:s+=l}:s=''
x.fillText('C:\\>'+s+'_',0,9)

Mar 23 2026 3:00 PM UTC

}// 134/140

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Uncompressed version of u/dee-gomma's MS-DOS

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rodrigo.siqueira

remix of d/35002 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(1)sepia(.6`
for(a=b=t,i=4e4;i--;b-=S(b/2.4)/1.3-C(a*4+3),a=(i/b&i%2)/8-b*a/2)x.fillRect(a*1e4-1800,b*1740+4e3,.1,t<3)

Mar 23 2026 2:17 PM UTC

}// 140/140

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Complex organic structure

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Xen

remix of d/33472 by u/kruno.ooo

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑦𫱲𚁣𛡷𪑤𭁨👩🐵𝠬𬡥𬱥𭀨𮀮𢰽𩡩𫁬𥁥𮁴𚐬𬡯𭁡𭁥𚀱𛠵𚐬𢰨𙱜𭐲𝰷𡀧𛀷𛀭𜐵𚐬𩡩𫁬𤡥𨱴𚀱𞐬𛐱𞐬𜐵𛀲𚐻𪐭𛐻𩡩𫁬𤱴𮑬𩐽𤠨𜐹𞐫𪐬𪐥𜰰𚠹𚐩𩡩𫁬𤡥𨱴𚀲𞐭𤰨𪐪𭀩𚠶𛀭𝀲𛑓𚁩𚐪𝐬𝐬𛠷𚐬𢰨𙱜𭑄𞀳𡑜𭑄𡀸𝠧𛀲𜰬𛐳𞐩𞰱𛱘𩑮`.replace(/u../g,'')))

Mar 23 2026 4:51 PM UTC

}// 140/140

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Shoutz 2 kruno.ooo !!!

u/Xen

Got yo back!, F*ck the duck!!
u/kruno.ooo

hell yeah!
u/Xen

Narrator:
u/Xen

"it was at this point the pesky duck was diminished, in a flock of flames it learned to perhaps not chase the small infinity bro.... he was once again free to continue a happy existence here in the dwitterverse, the others would move on to other projects.... yet Xen would maniacally re-visit this very dweet to ponder and giggle"

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rodrigo.siqueira

remix of d/34910 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()sepia('
for(i=1e4;i--;x.fillRect(960+X*20,540-Y*50,t<3,.1))F=i%(32/t),
X=F*S(k=i/t)-F*S(K=k/1.1)*2,Y=F*C(K+S(K))

Mar 24 2026 1:54 PM UTC

}// 136/140

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Light at the end of the tunnel #train

u/cantelope

nice

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katkip

remix of d/11886 by u/katkip

function u(t) {

seed=1/1e6
c.width*=1;for(i=43;i--;)for(j=71;j--;)x.fillStyle=R(z=C(j/seed+t/2)*99,k=S(i/seed+t/2)*99),x.fillRect(j*30-k-99,i*30-z-99,35,35)

Mar 22 2026 11:28 AM UTC

}// 140/140

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rodrigo.siqueira

remix of d/35081 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,n=4e3,n);n--;x.fillRect(960+a*S(n)*(2+C(n+t*3)/5)/2,540+a*C(n),w=a/35,w),x.fillStyle=`hsl(23,99%,${n/60}%`)a=n*n*2%400

Mar 22 2026 4:04 PM UTC

}// 137/140

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Disc with 12 segments

u/KilledByAPixel

Looks like an Aztec sun stone

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katkip

function u(t) {

c.width^=0;x.globalAlpha=t;for(i=866;i--;)x.fillStyle=R(29),x.lineTo(960+S(i*S(0.8)+t/19)*2e3,540+C(i*S(8)+t/19)*2e3);x.fill()

Mar 21 2026 7:43 PM UTC

}// 126/140

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u/ximavus

wow #trippy

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Axioplase

function u(t) {

c.width=2e3
for(j=J=120;j--;)for(i=I=225;i--;)a=i-I/2,b=j-J/2,a*a+b*b<(2+S(t))*5e2?x.fillRect(i*9,j*9,9*C(t+(y=(a*a+b*b)^.5)),9*C(t+y)):0

Mar 23 2026 9:29 PM UTC

}// 137/140

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Pulse

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KilledByAPixel

remix of d/26824 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󭽩󭍨󚍸󚝦󫽲󚍣󛭷󪝤󭍨󯌽󪜽󜜶󜌬󬽣󨝬󩜨󜬬󜜩󞽩󛜭󞽢󩝧󪝮󤍡󭍨󚍦󪝬󫌨󚜩󚝦󫽲󚍫󟝩󙜸󛍪󟜶󝌬󩭩󫍬󤽴󮝬󩜽󪜾󟬳󟜽󜜿󙼣󞝡󨬧󞭒󚌩󞽪󛜭󞽡󬭣󚍫󙜴󚭷󛌲󝼵󚽩󛼳󚼨󪼾󟬲󚜪󭼬󪜾󝼿󜬷󜬭󝬵󚬨󪬥󞌾󜼩󞬵󜬬󨜽󚍫󚽫󛼴󙬱󟼮󜜱󛝴󘌺󭌩󚽪󚬮󜌹󞌬󨜩󚝷󟜴󞌸`.replace(/u../g,'')))

Mar 20 2026 7:04 PM UTC

}// 139/140

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3D Gears ⚙️⚙️

u/cantelope

nope. sorry, the gears were already done
u/lewdev

🤣 u/cantelope