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/34601 by u/rodrigo.siqueira

function u(t) {

for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(Y*480+(i%3+1)*540+60,X*800+250,t<1,.1))
X=S(X*X-Y*Y/(i%3+1))+.34,
Y=T(𝕏*Y-.1+S(i/1.01+S(i+t)%1)/4)

Dec 13 2025 8:42 PM UTC

}// 133/140

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3 Organic Alien Structures

u/cantelope

#structures

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KilledByAPixel

remix of d/34603 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󠜽󥼽󝌷󜌊󡌽󣝡󭍨󛭲󨝮󩍯󫜨󭌪󟜶󜌩󚭗󒭆󟝚󟜾󮌮󩭩󫍬󤭥󨽴󚍁󚽴󙜴󚬴󞌰󛌱󜼰󛝚󛼲󚼨󭌾󟬲󚜪󜬷󜌬󜜬󦬬󮌮󩭩󫍬󤽴󮝬󩜽󨍨󬽬󚌤󮽈󯜠󙍻󦬯󟜳󯜥󙍻󦭽󙝠󚜊󩭯󬬨󦬽󜬻󠜻󦬫󟜱󛽗󚜨󡜽󡌫󦬪󠜯󥼭󦬯󜬦󦬫󞜩󙜵󯍼󡬨󜬶󜌬󢌽󡌩󚽆󚍗󛼨󦬫󡌯󥼩󛍈󚬽󜬬󦬽󜬩󚽁󛜭`.replace(/u../g,'')))

Dec 12 2025 5:20 PM UTC

}// 140/140

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Rooms 🚪

u/cantelope

#rooms

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ximavus

function u(t) {

x.fillRect(x.globalAlpha=.001/t,0,2e3,1080)
for(i=2e3;i--;)x.clearRect(i,C(t+i)**S(t+i)*t,9,9)

Dec 14 2025 7:27 PM UTC

}// 94/140

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Demonstration of a bug I found with x.globalAlpha. Breaking the .001961 limit. As long as it is more than .001961 at some point if will be valid

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ximavus

function u(t) {

x.font='5cm a'
x.fillText('🥩',960,540)
x.drawImage(c,Math.random()*4-2,Math.random()*4-2)

Dec 12 2025 7:14 PM UTC

}// 89/140

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Current theme #Food

u/cantelope

#food

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KilledByAPixel

remix of d/27943 by u/KilledByAPixel

function u(t) {

for(c.width=A=99;A;R+=.1)(t+R*A/50-R^R)%5||x.fillRect(A--,28-22/R,R/5,44/R,R=1)

Dec 11 2025 1:44 AM UTC

}// 79/140

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Smaller Wolf 🐺

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ximavus

function u(t) {

t?_='Backspace':$=''
onkeydown=k=>{l=k.key;if(l.length<2|l==_){l==_?$=$.slice(0,-1):$+=k.key}l=='Enter'?(eval($),$=''):0}
throw $

Dec 11 2025 6:43 PM UTC

}// 129/140

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Dwitter-CMD! (click on the canvas, write dwitter code and press enter)

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New_Core

function u(t) {

A="New Core"
eval(unescape(escape`𭰽𨰮𪁥𪑧𪁴🐲𩐳𒡸𛡦𪑬𫁔𩑸𭀨𠐬𜀬𭰩𒡦𫱲𚁩🐴𝐻𪐭𛐻𮀮𩁲𨑷𢑭𨑧𩐨𨰬𪐬𭰭𞐬𜐬𞐬𜀬𜰰𜀫𞐹𚡃𚁴𚠳𚱩𛰨𤰨𭀪𜠩𚰹𚐩𛀲𜐬𜐵𜀩𚑸𛡳𩑴𥁲𨑮𬱦𫱲𫐨𨐽𤰨𬐽𭀫𪐯𜰰𚐬𨠽𠰨𬐩𛀭𨠬𨐬𞐶𜀬𝐴𜀩`.replace(/u../g,'')))

Dec 9 2025 11:18 PM UTC

}// 134/140

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u/UEZ

nice! - #demo #scroller

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rodrigo.siqueira

remix of d/34600 by u/New_Core

function u(t) {

c.style.filter=`invert()`
for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(1500+Y*800,360-X*800,t<1,.1))X=S(X*X-Y*Y*.7),Y=C(2*𝕏*Y+2.03)-T(i-t)/(i%199+1)/8

Dec 10 2025 5:47 PM UTC

}// 140/140

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Alien cell

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lewdev

remix of d/34595 by u/ximavus

function u(t) {

A=s=>x.fillStyle=s
A`#0001`
t?x.fillRect(0,0,2e3,2e3):f=[]
A`#0f0`
f.push([Math.random()*2e3,0])
for(a of f)x.fillText(0,a[0],a[1]+=9)

Dec 10 2025 10:05 PM UTC

}// 134/140

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#Matrix Rain

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rodrigo.siqueira

remix of d/34598 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()`
for(𝕏=X=Y=i=2e4;i--;𝕏=X,x.fillRect(2350+Y*3600,60-X*6e3,t<1,.1))X=S(X*X-Y*Y*.6),Y=C(2*𝕏*Y+1.9)-S(i-t)/(i%19+.05)/4

Dec 9 2025 2:58 AM UTC

}// 140/140

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Quick sketch