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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ximavus

function u(t) {

x.reset()
F=_=>(270*S(i)+C(t)*270)
for(i=60;i--;){x.fillStyle=R(s=S(i/19)*2e2,s,s);x.fillRect(i*32,540,32,F());x.fillRect(i*32,540,32,-F())}

Nov 15 2025 9:09 AM UTC

}// 140/140

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This was gonna be a ray cast demo actually

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ximavus

remix of d/34519 by u/KilledByAPixel

function u(t) {

c.width|=onclick=_=>T=!T
t?a+=!T&&1/60:a=0
x.font='5in"'
x.fillText(a.toFixed(2),560,700)
onkeydown=_=>{a=0;T=1}

Nov 12 2025 4:44 PM UTC

}// 112/140

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Removed the moving box to add reset. You can use it to test your reflexes now

u/cantelope

fair remix
u/ximavus

credit to u/KilledByAPixel the original is very nice
u/ximavus

my pb on this one is 0.13
u/ximavus

I got 0.10 yay

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁩🐲𩐴𛁩𚐬𫠽𜠵𛁢🐵𜀻𪐭𛐻𮀮𨱬𩑡𬡒𩑣𭀨𞐶𜀫𦀯𦠪𚁨🐵𝀰𚐬𪀫𦐯𦠪𪀬𬰽𝡥𜰯𦠯𦠬𬰩𚑻𪑦𚀨𩀽𣑡𭁨𛡨𮑰𫱴𚁘🐨𚁩𛱢𛱢𯀰𚐫𭀩𙐸𚠱𝀭𝐶𛁙👩𙑢𛑮𚰮𝐬𦠽𚁩𛱢𯀰𚐥𨠭𫠩𚐼𫠩𦀯👤𛱮𛁙𛰽𩀯𫠬𦠯👤𛱮𞱚𚰽𨡽`.replace(/u../g,'')))

Nov 9 2025 11:51 PM UTC

}// 137/140

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spherical margin

u/ximavus

WOAH!
u/jellyedwards

So cool!
u/magna

Gasp!
u/aleamb

oh!

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dee-gomma

remix of d/34467 by u/dee-gomma

function u(t) {

eval(unescape(escape`𩡯𬠨𪰽𜐳𞐯𜰬𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁭👮🐱𝑥𜰬𨰮𭱩𩁴𪀽𭰽𝀸𜀩𞱮𛐭𞱸𛡦𪑬𫁓𭁹𫁥👒𚁲👢🠰🰴𜐰𞠷𜀬𬠯𜠩𛁸𛡦𪑬𫁒𩑣𭀨𜠴𜀭𠰨𨐩𚠱𜰰𛀶𜀪𮐬𫀽𨠾𜁼𮐾𜰫𨠬𫀩𚑢👓𚁡👮𛱭𚠶𛠲𞀫𭀯𜰩𛰴𛁳👮𚡮𙑫𛱫𛁹🐲𚱳𛑢𚰭𛑳𚡓𚁡𚠹𛑴𚠳𚐪𚠴𛰲`.replace(/u../g,'')))

Nov 10 2025 1:43 AM UTC

}// 138/140

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#crown 👑

u/KilledByAPixel

nice!
u/UEZ

brilliant
u/ximavus

There are even cops in the code to protect the crown

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KilledByAPixel

function u(t) {

eval(unescape(escape`󭽩󭍨󚍸󚝦󫽲󚍷󟜹󝬰󛍩󟜲󞽩󛜭󞽸󛭦󪝬󫍓󭍹󫍥󟜧󘼰󩭦󙼬󭍼󯍢󩝧󪝮󤍡󭍨󚍦󪝬󫌨󨝲󨼨󝜱󜌫󪜪󞜰󜌬󝜴󜌬󜼵󜌬󜌬󞜩󚜩󚝦󫽲󚍪󟜵󜜻󪬭󛜻󩭩󫍬󤭥󨽴󚍩󚭷󚼨󭌦󙭪󚬱󞜩󛍴󚬱󜜴󜌬󭌿󞜺󭼬󭌿󞜺󜭥󜼩󚝦󪝬󫍓󭍹󫍥󟝩󧬡󭌿󙼣󩭦󜌧󞬧󘼸󜍦󙼻`.replace(/u../g,'')))

Nov 10 2025 6:48 PM UTC

}// 132/140

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Color Balls Illusion 🔵

u/ximavus

ooh
u/KilledByAPixel

#illusion

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𨰮𭱩𩁴𪁼🐰𛁩🐲𩐴𛁮🐲𝐬𨠽𝐰𞱩𛐭𞱸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𦀯𦠪𚁨🐵𝀰𚐬𪀫𦐯𦠪𪀬𬰽𝡥𜰯𦠯𦠬𬰩𚑻𪑦𚀨𩀽𣑡𭁨𛡨𮑰𫱴𚁘🐨𚁩𛱢𛱢𯀰𚐫𭀩𙐸𚠱𝀭𝐶𛁙👩𙑢𛑮𚰮𝐬𦠽𚁩𛱢𯀰𚐥𨠭𫠩𚐼𫠩𦀯👤𛱮𛁙𛰽𩀯𫠬𦠯👤𛱮𞱚𚰽𨡽`.replace(/u../g,'')))

Nov 9 2025 11:53 PM UTC

}// 133/140

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spherical margin day mode

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KilledByAPixel

function u(t) {

c.width|=onclick=_=>T=!T
t?a+=!T&&1/60:a=0
with(x)textAlign='center',font='5in"',fillText(a.toFixed(2),960,700),fillRect(a%10*200,0,-90,200)

Nov 10 2025 8:24 PM UTC

}// 140/140

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Stopwatch ⏱️ Click to Start/Pause

Show more comments…
u/joeytwiddle

Nice but I wouldn't use it for the Olympics, over concerns about framedrops.
u/KilledByAPixel

I will make a compressed version that is perfectly accurate for Olympic use.
u/joeytwiddle

Thank you. I will pass it along to the Committee.
u/ximavus

nice one
u/ximavus

uh I pressed enter twice accidentaly
u/cantelope

fixed
u/ximavus

oh ok :-)

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rodrigo.siqueira

remix of d/34502 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert(`:𝕏=X=Y=0
for(i=3e4;i--;𝕏=X,x.fillRect(840+Y*400,X*600+380,t<2,.03))
X=S(X*X-Y*Y+.43),Y=C(2*𝕏*Y+1.1)+(X*X*Y*Y)/.9

Nov 9 2025 4:20 PM UTC

}// 138/140

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Alien Attractor #attractor

u/ximavus

Those attractor ones are very nice

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DazeWare

function u(t) {

c.width=1920
for(i=0;i<9;i++){
x.fillStyle = R(255*(S(t)*C(t))*S(i*C(t)))
x.fillRect(400+i*100+S(t)*300,400+9*S(t*i)*t*C(i),90*S(t),200)
}

Nov 8 2025 5:42 AM UTC

}// 138/140

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u/ximavus

oh nice one

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ximavus

function u(t) {

x.reset()
for(i=9;i--;)x.fillRect(400+i*99+S(t.toFixed())*300,400,50,200)

Nov 8 2025 5:09 PM UTC

}// 73/140

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Lagging #default

u/ximavus

I had uploaded it twice accidentaly
u/joeytwiddle

lol I hate it!
u/ximavus

:)