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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NiVZ

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀽𜐹𜠰𞱤👛𜰱𝐹𞐬𜠵𝰵𜐬𜠹𝠷𜐬𜠹𝠴𝰬𜠳𝀹𝰬𜰱𜐸𜰬𜰱𜠱𝐬𜠹𜠵𝰬𜰱𝰲𝰬𜰱𝠹𝑝𞱦𫱲𚁩🐰𞱩🀱𝐻𪐫𚰩𮱩𩠨𩁛𣑡𭁨𛡦𫁯𫱲𚁴𙐱𜀩𧐦𜐼🀱𝀭𪐩𮱸𛡦𪑬𫁒𩑣𭀨𞀷𜀫𚁩𙐳𚠶𜀩𛀴𜠰𚰨𣑡𭁨𛡦𫁯𫱲𚁩𛰳𚐪𝠰𚐬𝠰𛀶𜀩𯑽`.replace(/u../g,'')))

Mar 6 2026 12:36 PM UTC

}// 135/140

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LECO Font Count 10 Seconds

u/NiVZ

My first dweet. Using binary & bitshifting to display 3x5 font
u/cantelope

#amazing
u/tomxor

Great first dweet, I love bitpacking.
u/dee-gomma

Very good!
u/dee-gomma

You can squeeze it under 140 bytes with some tricks (need to reverse bits): for(x.reset(i=15);i--;)x.fillRect(870+i%3*60,60*(0|i/3),60,[31599,25751,29671,29647,23497,31183,31215,29257,31727,31695][0|t%10]&1<<i&&60)

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tomxor

remix of d/35004 by u/NiVZ

function u(t) {

for(c.width|=i=63;i--;)'筯璓珧秧䧭秏篏䤧篯积'.charCodeAt(t%10)&1<<i&&x.fillRect(14+i%3<<6,7+i/3<<6,64,64)

Mar 6 2026 9:38 PM UTC

}// 95/140

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LECO - Unicode Bitpacked

u/tomxor

This is actually 115 bytes so only an 11 byte reduction over hex encoding, because each of the 10 codepoints takes up 3 bytes each when utf8 encoded, (over the wire, in the DB or in a local file)

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tomxor

remix of d/35004 by u/NiVZ

function u(t) {

for(c.width|=i=15;i--;)0x3cf7fbef924fef3fce7c9edf3cfcf9fa49fb6fn&1n<<BigInt(~~t%10*15+i)&&x.fillRect(14+i%3<<6,7+i/3<<6,64,64)

Mar 6 2026 9:37 PM UTC

}// 126/140

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LECO - BigInt Hex Encoded

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rodrigo.siqueira

remix of d/35002 by u/rodrigo.siqueira

function u(t) {

for(a=b=t,i=4e4;i--;b-=S(b/4)-C(a*(t>.3||4)),a=(i/b&i%4)/3-b*a/4)x.fillRect(a*1e3+650,1200-b*244,.3,t<1)

Mar 5 2026 9:21 PM UTC

}// 104/140

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Crops under a cloudy sky 🌥️🌾

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rodrigo.siqueira

remix of d/34951 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(a=b=t,i=8e4;i--;b-=S(b/6)+C(a*2.8),a+=S(i/b&i%3)*3-b*S(a*2)/6-a*a/5)x.fillRect(b*240+820,a*1160,.1,t<1)

Mar 5 2026 1:26 AM UTC

}// 139/140

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Spectral Fractal #fractal

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FreeWill

function u(t) {

for(x.fillStyle="#0002",x.fillRect(0,0,i=2e3,i);i--;x.fillStyle=R(0,i/5,0))x.fillRect(960+C(a=i*3+t)*(d=i*C(t/2)),540+S(a)*d/3,s=d/99,s)

Mar 4 2026 5:53 PM UTC

}// 136/140

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Tilted Galaxy

u/ximavus

Matrix galaxy awesome

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rodrigo.siqueira

remix of d/34961 by u/cantelope

function u(t) {

for(c.width|=0,m=n=32;m--;)for(l=(.5+(t%.3/9+m/n)%1)**n,i=512;i--;x.strokeRect(960+(i%n-15.7)*l,540+((i/n|0)-8.5)*l,W=l/3,W))x.lineWidth=l/n

Mar 3 2026 8:58 PM UTC

}// 140/140

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Through the Squares #zoom #squares #uncompressed

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dee-gomma

remix of d/34948 by u/dee-gomma

function u(t) {

eval(unescape(escape`𭱩𭁨𚁸𚑻𩡯𬠨𭀿𫱮𨱬𪑣𪰽𧰽🡵𦱃🐷𛁳𚰫𧐽𪀺𬰽𜀬𬡥𬱥𭀨𪐽𬠽𝐰𜀩𛁨👲𚱲𚡓𚁴𚠶𚐬𬰥🐳𞱩𛐽𝐰𞱲𩑣𭀨𩀪𬱼𯁨𛁳𙠦𪀬𜠵𛀲𝐩𚑡𬡣𚁲𛁲𛁩𛀰𛁤🐱𩐳𚐻𩡩𫁬𨁥𭡥𫡯𩁤𨀬𩡩𫁬𤡥𨱴𚁵𦰰𧐫𬠪𚁃𙠦𠰭𛐩𛁵𦰱𧐬𬠬𬰾𜐦𙠱𝠬𩡩𫁬𤱴𮑬𩐽𤠨𩀩𚑽`.replace(/u../g,'')))

Mar 3 2026 8:48 PM UTC

}// 140/140

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#archery #interactive #game - click/tap to play

u/cantelope

wow
u/lewdev

Very fun!

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rodrigo.siqueira

remix of d/35006 by u/tomxor

function u(t) {

for(c.width|=s='ﯬ뽂뻈캾뻈비ƯįԯưƯџ',f=n=>s.charCodeAt(t%6+n),i=28;i--;)for(j=2;(f(0)|f(6)<<16)>>i&1&&j--;)x.fillRect((j?i%4:6-i%4)<<6,i<<4,64,64)

Mar 6 2026 11:27 PM UTC

}// 139/140

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Space Invaders 👾#invaders

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rodrigo.siqueira

remix of d/34961 by u/cantelope

function u(t) {

for(c.width|=0,m=n=25;m--;)for(l=(.5+(t%1/n+m/n))**50,i=625;i--;x.strokeRect(960+(i%n-n/2)*l,540+((i/n|0)-n/2)*l,l,l))x.lineWidth=l/3

Mar 4 2026 10:36 AM UTC

}// 133/140

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Square grid zoom #loop #fullscreen