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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magna

function u(t) {

c.style.cursor='wait';for(i=9;i--;)x.fillRect(400+i*100,400,50,200)

Oct 2 2025 5:16 AM UTC

}// 67/140

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CPU killer #default

u/KilledByAPixel

🤣
u/ximavus

lmao
u/ximavus

*PC Explodes*
u/tomxor

0xDD 🔥

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KilledByAPixel

function u(t) {

eval(unescape(escape`󩭯󬬨󨼮󭽩󩍴󪍼󟝪󟜴󞽪󛜭󞼩󩭯󬬨󪜽󜼰󞽩󛜭󞽸󛭲󫽵󫭤󤭥󨽴󚌮󛬮󪬾󜬿󦼷󜌰󚽩󙜹󚬷󜌫󤼨󚍫󟝩󛼹󯌰󚜫󭍼󜌩󚬱󜼰󛌴󜌰󛝹󚽫󚬹󞜰󛌳󝜬󜜴󜍝󞭛󪬿󪬪󜜲󜌰󛜸󝜵󞬵󜌰󛍩󚭺󛝹󛍺󛍺󛜴󜌬󞝝󚜩󮜽󭌥󜜪󞜹󜌬󮬽󪬿󞜹󞬹󞜰󒭸󛭦󪝬󫌨󮌮󬭥󨽴󚌲󞜰󛍡󟜱󝌱󜌬󨜬󛝡󚜩`.replace(/u../g,'')))

Oct 1 2025 2:07 AM UTC

}// 140/140

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Film Strip 🎞️ #default

u/Agnes

Great idea, should be combined with cuts to shaky hand-written black signs with white lettering saying "Clear the canvas!" and "Draw fifty-by-two-hundred rectangles"
u/aleamb

beautiful
u/ximavus

Behold! Dwee-Film!

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rodrigo.siqueira

remix of d/34372 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.2`
if(t<.2)for(n=i=8e4;i--;x.fillRect(940+180*l*S(q=i/300+S(i/t)*.6),540+460*C(l/1.3)*+S(q+l/2.5),.2,1))l=i/2e4

Oct 2 2025 12:44 PM UTC

}// 134/140

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Circular curves

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lewdev

remix of d/4368 by u/DasSchafImWolfspelz

function u(t) {

for(b=t*3,i=4,x.font="4in'";i--;)x.fillText([..."🃏🎴"][i%2],t*300+i*400,350+700-1/b*Math.abs(S(b))*700+i)

Oct 1 2025 11:33 PM UTC

}// 104/140

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Solitaire win screen attempt

u/ximavus

nice!
u/lewdev

Thanks. I wanted to have cards constantly jumping out but I lost steam.

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lewdev

remix of d/34375 by u/lewdev

function u(t) {

onmousedown=onmouseup=e=>x.beginPath(A=e.buttons)
onmousemove=e=>A&&x.lineTo(e.x*(s=c.width/innerWidth),e.y*s),x.stroke()

Oct 3 2025 8:47 PM UTC

}// 121/140

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🎨🖱️ Tiny Canvas Paint Dweet (click drag to draw)

u/ximavus

You did it! This was a big goal on my original paint project to click and paint instead of automatically painting
u/ximavus

You can put also onkeydown=e=>c.width|=0 at the end to add clearing by pressing keys

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lewdev

remix of d/34366 by u/lewdev

function u(t) {

onmousemove=e=>x.lineTo(e.x*(s=c.width/innerWidth),e.y*s),x.stroke()

Oct 1 2025 11:27 PM UTC

}// 68/140

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Paint that works in fullscreen too (-15b)

u/ximavus

good idea with the variable!
u/lewdev

I should credit u/KilledByAPixel in his dweet: d/34352 which does the same thing.

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rodrigo.siqueira

remix of d/34369 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.2`
if(t<1)for(n=i=30240;i--;x.fillRect(960+340*l*S(q=i/400+S(i/t)),840*C(l/1.63)*S(q+l/5)*C(q)+500,.4,1))l=i/1.21e4

Sep 30 2025 1:47 PM UTC

}// 138/140

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hopeomathy

function u(t) {

eval(unescape(escape`𭀿𨰮𭱩𩁴𪀽𠠽𝠰𜀺𚁋👛𩰽𦀽𦐽𜁝𛁯𫡭𫱵𬱥𫑯𭡥👥🐾𚁘👥𛡸𛁙👥𛡹𚐩𒡋𛡰𭑳𪀨𦱓𚁴𚠪𝰩𚡂𛁃𚁴𚠪𝐩𚡂𧐩𒡦𫱲𚁩𘁯𩠠𢰩𪑦𚀡𩰩𮰊𭐽𦀭𪑛𜁝𒡶👙𛑩𦰱𧐊𮀮𩡩𫁬𥁥𮁴𚁩🰢𧁵𜠶𜡦𘠺𭁼𜀬𪐿𪑛𜁝𚰽𭐯𠠺𦀬𪐿𪑛𜑝𚰽𭠯𠠺𦐩𒡧👵𚡵𚱶𚡶🀷𞑽`.replace(/u../g,'')))

Sep 27 2025 6:57 PM UTC

}// 140/140

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time survivor - to restart game : type a key after last parenthesis

Show more comments…
u/magna

Fun! And hard!
u/cantelope

a 'warp' cheat: move cursor off canvas to other side
u/joeytwiddle

Cool #game! I reached 29
u/aleamb

amazing!
u/ximavus

I got 33!
u/ximavus

using the warp cheat
u/ximavus

I got 87!
u/ximavus

warp cheat again

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rodrigo.siqueira

remix of d/34368 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.2`
if(t<1)for(n=i=33500;i--;x.fillRect(960+350*l*S(q=i/330+S(i/t)),660*C(l/1.63)**S(q+l/2)-250,.4,1))l=i/2e4

Sep 27 2025 4:46 PM UTC

}// 131/140

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Spiral bend

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Xen

remix of d/34365 by u/lewdev

function u(t) {

for(x.reset(i=500),x.font="2in'";i--;)x.fillText("█░▒▓"[(0|9*t+i*(t))%4],i+i%t*i+S(t)*i,i+i/t*i)

Sep 27 2025 10:29 PM UTC

}// 96/140

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Dont Danger Doors! '96