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) {

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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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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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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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

u/ximavus

How is this a remix of scrolling text?
u/rodrigo.siqueira

oh sorry, wrong remix source.. it should be a remix from my previous code d/34584
u/ximavus

I actually do that many times when I'm tinkering with rna
u/ximavus

*random dweets and forget about the original one but I mostly don't post my dweets

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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

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rodrigo.siqueira

remix of d/34592 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(Y*2300+2200,-X*3e3,t<2,.1))X=S(X*X-Y*Y*.6),Y=C(2*𝕏*Y+2)-S(i-t)/(i%19+.03)

Dec 7 2025 8:43 PM UTC

}// 140/140

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Orbit and chaos

u/joeytwiddle

#galaxy
u/tomxor

This one reminds me of the wondefully artful "Raised by Wolves" title sequence: https://www.artofthetitle.com/title/raised-b…
u/carbontwelve

I absolutely love this
u/ximavus

its like a star forming

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ximavus

function u(t) {

eval(unescape(escape`𮀮𩡩𫁬𤱴𮑬𩐽𤠨𚐊𭀿𮀮𩡩𫁬𤡥𨱴𚁸𛡧𫁯𨡡𫁁𫁰𪁡🐮𜐬𜀬𜡥𜰬𜡥𜰩𞡦👛𧐊𮀮𩡩𫁬𤱴𮑬𩐽𙰣𜀰𩡦𜀰𙰊𩠮𬁵𬱨𚁛𣑡𭁨𛡲𨑮𩁯𫐨𚐪𜡥𜰬𜁝𚐊𩡯𬠨𪐽𩠮𫁥𫡧𭁨𞱩𛐭𞱸𛡦𫱮𭀽𙰱𨱭𘁡𙰩𮀮𩡩𫁬𥁥𮁴𚁓𚁴𚐼𜀿𜐺𜀬𩡛𪑝𦰰𧐬𩡛𪑝𦰱𧐫🐹𚐻`.replace(/u../g,'')))

Dec 7 2025 11:35 AM UTC

}// 138/140

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Matrix

u/ximavus

forgot to say the idea was from u/omersm's matrix dweet
u/lewdev

I can see the inspiration: d/34590