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.

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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

Show more comments…
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)
u/ximavus

I love it

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Xen

function u(t) {

x.drawImage(c,z=C(t/4),Z=S(t/7))
x.strokeRect(910+455*z,490+245*Z,q=280,q)
x.strokeStyle=`hsl(${t^z*q} 99%10%)`

Mar 7 2026 11:42 AM UTC

}// 111/140

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i've been away for so long :( , quick play.

u/cantelope

wb xen
u/tomxor

me too, wb :)

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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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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)
u/dee-gomma

Top!

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rodrigo.siqueira

remix of d/35007 by u/rodrigo.siqueira

function u(t) {

s='ﯬ빆캾뻈비ƯįɈưƯџ'
eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼👦👮🐾𬰮𨱨𨑲𠱯𩁥𠑴𚁴𙐶𚱮𚐬𪰽𪐽𜐲𞀻𪐭𛐻𚑦𫱲𚁪🐲𞰨𩠨𜀩𯁦𚀶𚐼🀱𝠩🠾𪐦𜐦𙡪𛐭𞱸𛡦𪑬𫁒𩑣𭀨𚁪🱩𙐴𞠶𛑩𙐴𚐪𪰫𝐱𜠬𪰫𪰪𪐾🠲𛀱𜠸𛀱𜠸𚐩𨰮𬱴𮑬𩐮𩡩𫁴𩑲🐧𪑮𭡥𬡴𚀧`.replace(/u../g,'')))

Mar 7 2026 3:09 PM UTC

}// 139/140

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Space Invaders Generator 👾#invaders

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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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KilledByAPixel

remix of d/35006 by u/tomxor

function u(t) {

for(j of Date(c.width|=X=9).slice(16,24))for(X+=4,i=15;i--;)'筯璓珧秧䧭秏篏䤧篯积А'.charCodeAt(j<=9?j:10)&1<<i&&x.fillRect(X+i%3<<5,15+i/3<<5,32,32)

Mar 7 2026 9:03 PM UTC

}// 138/140

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Digital #Clock 🕰️

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mathisvdr

remix of d/35005 by u/tomxor

function u(t) {

for(c.width|=i=15;i--;)0x3db7f493e7cfe79e4f6f9cff79f249fdf7f9efn&1n<<BigInt(~~t%10*15+i)&&x.fillRect(14+i%3<<6,7+i/3<<6,64,64)

Mar 7 2026 5:18 PM UTC

}// 126/140

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countdown

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mathisvdr

function u(t) {

eval(unescape(escape`𨰮𬱴𮑬𩐮𩡩𫁴𩑲👠𪑮𭡥𬡴𚀩𬱥𬁩𨐨𨀊𩡯𬠨𨐽𨠽𭀬𪐽𞁥𝀻𪐭𛐻𨠭👓𚁢𛰵𚐫𠰨𨐪𜰩𛁡𚰽𤰨𪐯𨠦𪐥𜰩𚠳𛑢𚡓𚁡𚠲𚐯𝐭𨐪𨐯𝀩𮀮𩡩𫁬𤡥𨱴𚁢𚠲𜠰𚰸𜠰𛁡𚠱𜐰𜀬𛠱𛁴🀱𚐠`.replace(/u../g,'')))

Mar 7 2026 5:15 PM UTC

}// 112/140

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attractor red

u/cantelope

feel free to use the remix button, please, when credit is due