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

Please log in (or register) to post a dweet (copy-paste the code somewhere safe to save it meanwhile)


    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

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/34549 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert()sepia(`:𝕏=X=Y=0
for(i=3e4;i--;𝕏=X,x.fillRect(X*3e3-630,Y*4e3+820,t<2,.1))X=(X*X-Y*Y*.3)%.8+.27,Y=C(2*𝕏*Y+1.7)

Nov 28 2025 6:17 PM UTC

}// 135/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Carnivore attractor

u/magna

RAWR

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/34565 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`𪰽𣑡𭁨𛡡𨡳𚁾勺𜠪𭀥𜰩𚐯𜐴𞱩𩠨𘑴𯁼𘐨𩡲𨑭𩐥𜰰𚐩𨰮𬱴𮑬𩐮𩡩𫁴𩑲👠𪑮𭡥𬡴𚀩𬱥𬁩𨐨𛠶𚑠𛁣𛡷𪑤𭁨𯀽𜀻𢰽𦀽𦐽𭀻𩡯𬠨𪐽𜡥𝀻𪐭𛐻𢰽𦀬𮀮𩡩𫁬𤡥𨱴𚁘𚠳𩐳𛐶𜰰𛁙𚠴𩐳𚰸𜠰𛀱𛀮𝐩𚑘🐨𦀪𦀭𦐪𦐪𚀮𜠫𪰩𚐥𛠸𚰮𜠷𛁙👃𚀲𚡋𚡙𚰱𛠷𚐻`.replace(/u../g,"")))

Nov 29 2025 5:26 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Beware of the attractor. It bites.

show FPS hide FPS share fullscreen

tzador

function u(t) {

x.clearRect(0,0,1920,1080)
F = (x)=>Math.abs(x-Math.round(x))*2
x.fillRect(1820 * F(t/1820*333),980 * F(t/980*333),99,99)

Nov 27 2025 7:33 AM UTC

}// 121/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Bouncy Box

u/ximavus

#dvdbounce

show FPS hide FPS share fullscreen

rodrigo.siqueira

remix of d/34562 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.4)invert()`;𝕏=X=Y=t
for(i=3e4;i--;𝕏=X,x.fillRect(120-Y*3e3,X*2e3-490,t<3,.1))
X=(X*X-Y*Y*.7)%1+.39,Y=C(2*𝕏*Y+2.2)+.08

Nov 28 2025 12:31 AM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Alien blue plants

show FPS hide FPS share fullscreen

skeletonNatte

function u(t) {

s=15
r=_=>Math.random()*255
for(i=2e4;i--;x.fillStyle=R(r(),r(),r()))x.fillRect(i%(l=c.width/s)*s,i/l*s,s,s)

Nov 29 2025 9:51 PM UTC

}// 108/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Random color noise

u/skeletonNatte

https://www.youtube.com/watch?v=ADP_qNIbe0M

show FPS hide FPS share fullscreen

lewdev

remix of d/34488 by u/ximavus

function u(t) {

for(x.reset(X=120);X--;)for(Y=120;Y--;)X&Y+99*t&&x.fillRect(X*16,Y*9,16,9)
for(i=9;i--;)x.fillRect(S(t)*300+99*i+450,400,50,200)

Nov 26 2025 8:29 PM UTC

}// 128/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

🔻Scrolling Sierpinsky (golfed -15b) with #default

u/ximavus

#default looks like its falling
u/ximavus

#illusion

show FPS hide FPS share fullscreen

alexsav

remix of d/34552 by u/ximavus

function u(t) {

t?onkeydown=k=>s={s:s.slice(x.reset(o=k.key),-1),r:s+`
`,t:s}[o[4]]||s+o:s=`
` 
x.font='2cm a'
s.split`
`.map((t,i)=>x.fillText(t,0,i*60))

Nov 25 2025 12:36 PM UTC

}// 138/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Text Editor Uncompressed

u/alexsav

More details: https://github.com/alexsave/dweets/tree/main…
u/ximavus

Oh my goodness congratulations!
u/cantelope

works gud 👍

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/34557 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert(`:𝕏=X=Y=0
for(i=3e4;i--;𝕏=X,x.fillRect(X*3e3-580,Y*5e3-400,t<3,.1))X=T(X*X%.5-Y*Y+X**9
-Y**3)+.33,Y=C(2*𝕏*Y+1.2)

Nov 26 2025 11:50 PM UTC

}// 137/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Light and shadow on rounded shapes

show FPS hide FPS share 1 remix fullscreen

rodrigo.siqueira

remix of d/34554 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(𝕏=X=Y=i=3e4;i--;𝕏=X,x.fillRect(2300+Y*2500,99-X*2400,t<1,.1))X=S(X*X)-S(Y*Y),Y=C(2*𝕏*Y+1.91)-T(i-t)/1900

Nov 25 2025 1:21 PM UTC

}// 140/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

Strange fuzzy lights

show FPS hide FPS share fullscreen

lewdev

remix of d/34552 by u/ximavus

function u(t) {

eval(unescape(escape`琿砮牥獥琨潮步祵瀽欽㹻搽欮步祃潤攻搽㴸㽳㵳⹳汩捥⠰Ⱝㄩ㩤㴽ㄳ㽳⬽≜渢㩤㸳ㄿ猫㵫⹫敹㨰紩㩳㴧屮✊景爨栽献獰汩瑠屮怬椽栮汥湧瑨ⱸ⹦潮琽✲捭∧㭩ⴭ㬩砮晩汬呥硴⡨孩崬〬㘰⩩⤠`.replace(/u([^D].)/g,'$1%')))

Nov 25 2025 7:09 PM UTC

}// 134/140

Please log in (or register) to post as a new dweet (copy-paste code somewhere safe to save it meanwhile).

u/ximavus canvas text editor

u/ximavus

Congrats dude!