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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tzador

function u(t) {

for(i=0;i<3e3;i++) {
  x.fillStyle=R(100+30*S((i**2)**2+S(t)*9),100+30*S(i**2+S(t)*9)+2)
  x.fillRect(i%192*120,~~(i/192)*120,120,120)
}

Dec 18 2025 12:04 AM UTC

}// 137/140

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Bathroom tiles

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rodrigo.siqueira

remix of d/34609 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(𝕏=X=Y=i=4e4;i--;𝕏=X,x.fillRect(Y*700+760,X*700+500,t<1,.1))X=T(X*X-Y*Y)+.3,Y=T(2*𝕏*Y+.15+S(t+i*.98+S(i%1.2))/9)

Dec 15 2025 3:34 PM UTC

}// 140/140

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Organic storm

u/joeytwiddle

#organic #virus #cell

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KilledByAPixel

remix of d/34607 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󭌿󭌪󟜶󜌺󡌽󡍡󭍥󛭮󫽷󚌩󛼹󒭦󫽲󚍚󟜳󞼨󡌫󦬪󭌯󝌸󜌭󦬯󜬦󦬫󜜹󚜥󝜻󚝚󚼽󛬰󜜊󩭯󬬨󦬽󝌰󜌯󦬬󪜽󜜵󜌻󪜭󛜻󮌮󩭩󫍬󤭥󨽴󚍴󚬴󛌴󞌰󛜨󪜿󪜥󜬿󪜺󛝩󞭚󛼲󚜪󝌬󝌬󪜿󞌺󦬪󝜩󚝸󛭦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󡌯󚍩󟽩󙜲󚼱󞬳󚝽󘌤󮽩󟽩󛼶󞭚󛼲󯜥󙍻󪜿󪜯󜬺󦬯󜭽󙝠`.replace(/u../g,'')))

Dec 15 2025 7:37 PM UTC

}// 140/140

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Backrooms 🏢

u/ximavus

boogie man is lurking...
u/cantelope

#random #generative

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KilledByAPixel

function u(t) {

$='🍒🔔💎'
eval(unescape(escape`󭌿󨜫󟜨󝬭󨜩󛼹󞜺󚍯󫭣󫍩󨽫󟝥󟜾󩌽󡍡󭍥󛭮󫽷󚍡󟜰󚜩󚌩󒭦󫽲󚍣󛭷󪝤󭍨󯌽󪜽󜜵󛍸󛭦󫽮󭌽󙼵󪝮󘬧󞽩󛜭󞽸󛭦󪝬󫍔󩝸󭌨󦼮󛬮󙍝󦼨󩌦󚍩󚽢󯌰󚜪󚬳󛬷󚜥󜽝󛌶󝌰󚭘󛌱󝌰󜌭󚍙󛝢󙜱󚜪󝬷󜌩󚝘󟝩󛼵󯌰󛍙󟝩󙜵󛍢󟝡󛝘󚼲󛍢󟝢󟌵󟽢󚬴󞬲󜌻`.replace(/u../g,'')))

Dec 15 2025 7:43 PM UTC

}// 140/140

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Slot Machine 🎰 Click to Spin

u/KilledByAPixel

I fixed the bug with the date causing it to sometimes be broken.
u/KilledByAPixel

#slots
u/ximavus

nice! lets go gamling! aw dangit! *gambles* aw dangit! *gambles* aw dangit!
u/lewdev

After about 20 tries I finally won!

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lewdev

remix of d/34602 by u/lewdev

function u(t) {

eval(unescape(escape`󬬽󣝡󭍨󛭲󨝮󩍯󫜻󠜽󬼽󟭸󛭦󪝬󫍓󭍹󫍥󟝳󒭁󨌣󜌰󜌱󨌊󭌿󮌮󩭩󫍬󤭥󨽴󚌰󛌰󛌲󩜳󛌲󩜳󚜺󩬽󫭥󭼠󠝲󬭡󮜨󞜹󚜮󩭩󫍬󚌩󛭭󨝰󚍟󟜾󦽲󚌩󚬲󩜳󛍲󚌩󚬱󩜳󧜩󒭁󨌣󜍦󜍠󒭩󟜰󞽦󫽲󚍡󘍯󩬠󩬩󮌮󩭩󫍬󥍥󮍴󚌰󛍃󚍩󚭴󚽩󚜪󞜹󚽡󦼰󧜬󤼨󪜪󭌫󪜫󚼩󚬹󞜫󨝛󜝝󚜻`.replace(/u../g,'')))

Dec 15 2025 3:22 AM UTC

}// 138/140

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Spinning Zeroes

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KilledByAPixel

remix of d/34585 by u/KilledByAPixel

function u(t) {

for(i=214;i--;x.fillStyle=`hsl(${(i+j+j/240)*120} 100%50%`)x.fillRect(i*9,(j=t*60)*9,9,9)

Dec 16 2025 12:42 AM UTC

}// 89/140

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Rainbow Gray 🌈🐘

u/ximavus

Those RGB illusions (or probably HSL) are nice

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rodrigo.siqueira

remix of d/34601 by u/rodrigo.siqueira

function u(t) {

for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(Y*480+(i%3+1)*540+60,X*800+250,t<1,.1))
X=S(X*X-Y*Y/(i%3+1))+.34,
Y=T(𝕏*Y-.1+S(i/1.01+S(i+t)%1)/4)

Dec 13 2025 8:42 PM UTC

}// 133/140

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3 Organic Alien Structures

u/cantelope

#structures
u/aleamb

Reminds me "Pillars of Creation"
u/ximavus

yeah me too

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KilledByAPixel

remix of d/34603 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󠜽󥼽󝌷󜌊󡌽󣝡󭍨󛭲󨝮󩍯󫜨󭌪󟜶󜌩󚭗󒭆󟝚󟜾󮌮󩭩󫍬󤭥󨽴󚍁󚽴󙜴󚬴󞌰󛌱󜼰󛝚󛼲󚼨󭌾󟬲󚜪󜬷󜌬󜜬󦬬󮌮󩭩󫍬󤽴󮝬󩜽󨍨󬽬󚌤󮽈󯜠󙍻󦬯󟜳󯜥󙍻󦭽󙝠󚜊󩭯󬬨󦬽󜬻󠜻󦬫󟜱󛽗󚜨󡜽󡌫󦬪󠜯󥼭󦬯󜬦󦬫󞜩󙜵󯍼󡬨󜬶󜌬󢌽󡌩󚽆󚍗󛼨󦬫󡌯󥼩󛍈󚬽󜬬󦬽󜬩󚽁󛜭`.replace(/u../g,'')))

Dec 12 2025 5:20 PM UTC

}// 140/140

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Rooms 🚪

u/cantelope

#rooms

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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