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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luta

remix of d/36054 by u/luta

function u(t) {

s="k7/pp1K4/N7/8/8/8/8/7B"
n="\n";s=s.replace(/./g,x=>x<"0"?n:x<9?"... ".repeat(x):"♔♕♖♗♘♙♚♛♜♝♞♟"["KQRBNPkqrbnp".indexOf(x)]||"")
throw n+s

Aug 1 2026 12:56 PM UTC

}// 139/140

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FEN viewer for #chess puzzles alternative

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luta

remix of d/36035 by u/luta

function u(t) {

eval(unescape(escape`󭌿󜌺󨼮󭽩󩍴󪌽󜬴󜌊󩭯󬬨󩬽󫬽󪜽󪬽󪼽󜌻󫬼󜬻󫬫󚼩󬌽󭌪󝬰󛼲󝼪󚭮󛍱󟜳󚬪󫬬󢜽󬍼󜌬󢬽󬌯󜽼󜌬󢼽󬌯󞝼󜌬󩬫󟝉󙜳󙜲󚽊󙜳󙜲󚽋󙜳󙜲󟬾󜜬󪜫󟝉󙜳󚭱󛍪󚼽󢬥󜼪󬜪󜬬󪼫󟝋󙜳󚭱󞽦󯍼󭌪󝬰󟬷󜬸󯍼󮌮󩭩󫍬󥍥󮍴󚌢󧍵󡌸󜽅󧍵󡍄󠽁󘬬󝬶󚼹󚭩󛝪󛌹󞜫󪜫󪬭󞜪󪼩`.replace(/u../g,'')))

Jul 31 2026 9:51 AM UTC

}// 140/140

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Menger sponge #fractal

u/KilledByAPixel

very good surface area on this ice cube, i bet it melts incredibly fast
u/luta

the last ice cube is missing, i missed this one, better would be ||t>12.14|| in the code

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luta

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󜼲󜌻󨼮󬽴󮝬󩜮󩭩󫍴󩝲󟜧󪝮󭭥󬭴󚌱󙼻󩭯󬬨󪬽󝌴󞽪󛜭󞼩󦌽󤼨󪜽󪬫󭌩󚼲󚭓󚌲󚭩󚜬󦜽󠼨󪜩󛜲󚭃󚌲󚭩󚜬󦬽󛝓󚌳󚭩󚜬󩌽󦜪󤼨󨬽󠼨󭌩󚜫󠼨󨬩󚬨󩬽󦌪󤼨󭌩󛝚󚭢󚜬󮌮󩭩󫍬󤭥󨽴󚌱󝜰󚼲󜌪󚍘󚭢󚽚󚭓󚍴󚜩󛌹󝬫󜬰󚬨󦜪󠼨󨬩󛝓󚍢󚜪󩬩󛌴󛝤󛌴󛝤󚜻`.replace(/u../g,'')))

Jul 30 2026 11:13 AM UTC

}// 140/140

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trefoil #knot

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luta

remix of d/36058 by u/luta

function u(t) {

s="K7/k"
f="♔♕♖♗♘♙♚♛♜♝♞♟"
eval(unescape(escape`󮌮󩭯󫭴󟜧󜜲󞍰󮌢󙼻󬼽󬼮󬭥󬍬󨝣󩜨󛼮󛽧󛍸󟜾󮌼󘬹󘬿󘭜󭜲󝝁󜬢󛭲󩝰󩝡󭌨󮌩󞭦󦼢󢽑󤭂󣭐󪽱󬭢󫭰󘬮󪝮󩍥󮍏󩬨󮌩󧝼󯌢󘬩󒭦󫽲󚍩󟜶󝌻󪜭󛜻󚝸󛭦󪝬󫍔󩝸󭌨󬽛󪝝󛍩󙜸󟌼󝼬󜜫󪜯󞌼󟌷󚜻`.replace(/u../g,'')))

Aug 1 2026 1:34 PM UTC

}// 140/140

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FEN viewer for #chess puzzles cheat - put valid FEN string into s

u/luta

Example Mate in 3: "k7/pp1K4/N7/8/8/8/8/7B"
u/luta

8/8/8/5K1k/5B2/6P1/6P1/4b3 hint: first move is with B

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luta

remix of d/36056 by u/luta

function u(t) {

eval(unescape(escape`󭌿󜌺󮌮󭍲󨝮󬽦󫽲󫜨󭬽󛬷󛍶󛌭󭬬󭬬󞜶󜌬󝜴󜌩󞽯󫭣󫍩󨽫󟝟󟜾󮽱󟝲󟜨󬼽󝌹󞜩󚭍󨝴󪌮󬭡󫭤󫽭󚌩󯌰󒭸󛭦󫽮󭌽󙼱󜽩󫬢󙼻󮌮󩭩󫍬󥍥󮍴󚌢󧍵󡌸󜽅󧍵󡍄󝭁󘬬󛜸󜬰󛌶󜬰󚜊󩭯󬬨󪜽󜝥󝌻󪜭󛜻󮌮󩭩󫍬󤭥󨽴󚌲󝌰󛝱󛍲󛜲󝜰󛌶󛌶󚜩󬜽󚍲󚭲󚽱󚜥󬼬󬬽󚍱󚭱󚽲󚜥󬽽`.replace(/u../g,'')))

Aug 1 2026 11:46 AM UTC

}// 140/140

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#pareidolia #random oracle - click to see if your favourite idol appears on a toast bread

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luta

function u(t) {

c.width=128;s="k7/pp1K4/N7/8/8/8/8/7B".replace(/./g,x=>x<"9"?"☐".repeat(x):x)
for(i=64;i--;)x.fillText(s[i],i%8*9,(1+i/8|0)*9)

Jul 31 2026 1:27 PM UTC

}// 126/140

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Mate in 3: FEN viewer for #chess #game puzzles

u/luta

Another one: 8/8/8/5K1k/5B2/6P1/6P1/4b3
u/SockTaters

you can also display them as cheese pieces like in this one d/35680

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rodrigo.siqueira

remix of d/36042 by u/rodrigo.siqueira

function u(t) {

x.translate(540,1500)
with(x)for(i=16;i--;c.style.filter=`invert(`)scale(1,4),beginPath(),arc(0,0,i*i,0,1),fill(),scale(.996,1/4),rotate(5)

Jul 31 2026 1:39 AM UTC

}// 139/140

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Thorn Vortex

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rodrigo.siqueira

remix of d/36036 by u/rodrigo.siqueira

function u(t) {

x.translate(1920,940)
with(x)for(i=13;i--;)for(j=9;j--;)scale(1,4),beginPath(),arc(900/i*S(i+t),0,i*i,0,1),fill(),scale(.9994,1/4),rotate(4)

Jul 30 2026 10:42 AM UTC

}// 140/140

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Thorn Spiral #spial

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luta

remix of d/36061 by u/luta

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󜜶󜌻󬼽󜬲󞽷󪝴󪌨󮌩󩭯󬬨󩌽󝬻󩌭󛜻󚝦󫽲󚍪󟜹󛍘󟝙󟝚󟝳󛼲󞽪󛜭󞽘󟝪󙜲󚭳󛍙󟜨󪬾󟬱󚜥󜬪󬼬󦬽󚍪󛼵󯌰󚜪󬼩󦌪󠼨󭌩󛝙󚭓󚍴󚜾󜜱󚭤󛜲󜍼󯌨󩭩󫍬󤽴󮝬󩜽󘬣󝼹󞌢󛍢󩝧󪝮󤍡󭍨󚍦󪝬󫌨󨝲󨼨󞌰󚽘󚭓󚍴󚜫󦜪󠼨󭌩󛌴󝌫󦬬󞜬󜌬󝼩󚜬󬽴󬭯󪽥󚌩󚜩󞼻`.replace(/u../g,'')))

Aug 1 2026 6:54 PM UTC

}// 140/140

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bcc crystal structure

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luta

remix of d/36041 by u/luta

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󜜶󜌻󬼽󜜵󞽷󪝴󪌨󮌩󩭯󬬨󩌽󝬻󩌭󛜻󚝦󫽲󚍪󟜲󝼻󪬭󛜻󦌪󠼨󭌩󛝙󚭓󚍴󚜾󜜱󚭤󛜲󜭼󯍪󙜲󯍼󚍦󪝬󫍓󭍹󫍥󟜢󘼷󞌹󘬬󨭥󩽩󫭐󨝴󪌨󩭩󫍬󚍡󬭣󚌸󜌫󦌪󤼨󭌩󚽙󚭃󚍴󚜬󜼶󚽚󛌹󛌰󛌷󚜩󛍳󭍲󫽫󩜨󚜩󚜩󦌽󪬥󜼪󬼭󬼬󦜽󚍪󛼳󯌰󚜥󜼪󬼭󬼬󦬽󚍪󛼹󯌰󚜪󬼻`.replace(/u../g,'')))

Aug 1 2026 5:10 PM UTC

}// 140/140

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fcc crystal structure