Dweets awesomed by u/robotman_

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.

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Current theme challenge: #Food

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𡠽𫠽🡸𛡦𪑬𫁒𩑣𭀨𞐶𜀫𨐬𪀫𨠬𞐬𞐩𛁨🐵𝀰𛁩👣𛡷𪑤𭁨𯀽𜀻𪐭𛐻𡠨𨐽𦀬𨠽𦐩𚑻𩡯𬠨𦀽𤰨𪐩𚠨𫀽𜐵𜀩𛁙👃𚁩𚐪𫀬𩀽𜀬𫐽𜰻𫐭𛐻𨠽𠰨𬐩𚡬𛁤👍𨑴𪀮𪁹𬁯𭀨𩐽𨐭𦀬𩠽𨠭𦐩𛰸𛁘𛐽𩐪𚁶🐹𛱤𚐬𡠨𦐭👦𚡶𚐩𨐽𤰨𬐽𜠪𫐩𚠨𫀽𪀪𠰨𭀫𫐩𚑽`.replace(/u../g,'')))

Mar 8 2026 10:07 PM UTC

}// 140/140

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repulsors and blobbo

u/ximavus

cant understand the code I see there's hypot tho so its for curving I guess

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KilledByAPixel

remix of d/35006 by u/tomxor

function u(t) {

for(j of Date(c.width|=X=9).slice(16,24))for(X+=4,i=15;i--;)'筯璓珧秧䧭秏篏䤧篯积А'.charCodeAt(j<=9?j:10)&1<<i&&x.fillRect(X+i%3<<5,15+i/3<<5,32,32)

Mar 7 2026 9:03 PM UTC

}// 138/140

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Digital #Clock 🕰️

u/NiVZ

Wow! I had this in mind when I posted my sweet but had no idea how to pull it off. Well done 👏
u/KilledByAPixel

thanks for the inspiration!

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tomxor

remix of d/35004 by u/NiVZ

function u(t) {

for(c.width|=i=63;i--;)'筯璓珧秧䧭秏篏䤧篯积'.charCodeAt(t%10)&1<<i&&x.fillRect(14+i%3<<6,7+i/3<<6,64,64)

Mar 6 2026 9:38 PM UTC

}// 95/140

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LECO - Unicode Bitpacked

u/tomxor

This is actually 115 bytes so only an 11 byte reduction over hex encoding, because each of the 10 codepoints takes up 3 bytes each when utf8 encoded, (over the wire, in the DB or in a local file)
u/dee-gomma

Top!
u/NiVZ

Loving seeing all the remixes. I've had another observation. The top left and bottom right segments are always filled. That means the binary can be reduced from 15 bits to 13 bits. Or a max value of 32,767 to 8,191. Would that help to compress things further?

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rodrigo.siqueira

remix of d/34961 by u/cantelope

function u(t) {

for(c.width|=0,m=n=32;m--;)for(l=(.5+(t%.3/9+m/n)%1)**n,i=512;i--;x.strokeRect(960+(i%n-15.7)*l,540+((i/n|0)-8.5)*l,W=l/3,W))x.lineWidth=l/n

Mar 3 2026 8:58 PM UTC

}// 140/140

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Through the Squares #zoom #squares #uncompressed

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tomxor

function u(t) {

eval(unescape(escape`𩡯𬠨𥁛𜐶𜀰𧐫👓𚁴𚠹𚐬𨰮𭱩𩁴𪀽𭰽𜐲𞀬𪐽𜑥𝀻𪐭𛐻𮀮𩡩𫁬𤡥𨱴𚁩𙑷𛁩🠾𝰬𜐬𜐩𚑕👵𛁵👔𦱩𧐽𥁛𪑝𚰨𠱛𪑝𛑃𦱩𛐱𧐭𤱛𪑝𚱓𦱩𛑷𧐩𛰱𝑼𯀰𛁸𛡦𪑬𫁓𭁹𫁥👒𚀳𜠰𚡍𨑴𪀮𪁹𬁯𭀨𭐪𚁓𦱩𧐽𤱛𪑝𛑔𦱩𚱷𧐫𭑼𯀰𚐬𭐪𚁃𦱩𧐽𠱛𪑝𚱕𛑵𯁼𜀩𚐩`.replace(/u../g,'')))

Mar 1 2026 1:51 AM UTC

}// 140/140

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#FDTD #Electromagnetic Sim - Rendering #Poynting Vector (EM Flux)

Show more comments…
u/tomxor

I don't really understand maxwell equations, I just wanted to see if I could fit an FDTD into a dweet, and the Poynting vector of the EM field flow looks kinda cool.
u/tomxor

It's essentially a 2D sim of a point oscillator in a reflective box (although technically left and right wrap around), it has absolutely no physical equivalence, all parameters are normalised and tuned for visual preference.
u/ximavus

basically waves bouncing in a box? This visualization is really good though
u/cantelope

oh. well if has no physical equivalence then...
u/tomxor

I just meant that it's more abstract, because FDTD is commonly used to simulate a particular thing in real life.
u/ximavus

yeah waves bouncing in a box is the only way I understand it its a lot more complex than that

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛁷🐳𩐳𛁷𚐬𬠽𫠽🠨𪐫𫠩𚠪𜰮𜐥𜐬𫐽𜰮𜐬𪐽𭰻𪐭𛐻𮀮𨱬𩑡𬡒𩑣𭀨𞐶𜀫𤰨𬀽𭀯𝀫𝰪𬠨𜀩𚐪𤰨𬐽𬠨𜐩🀮𝐿𫐪𭠺𫐭𫐪𭠩𚠨𫀽𚁩𛰳𚱴𛰴𚐥𜐩𛰨𦠽𠰨𬀩𚡓𚁱𚐪𫀫𜐩𚠨𪀽𝐴𜀩𛁨𚱃𚁱𚐪𫀯𦠪𪀬𬰽𝀯𦠬𬰩𚑶👲𚁷𚐪𚠮𝐯𜠻`.replace(/u../g,'')))

Feb 27 2026 7:02 PM UTC

}// 139/140

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u/ximavus

I see recursive explosion

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rodrigo.siqueira

remix of d/34902 by u/rodrigo.siqueira

function u(t) {

for(i=720;i--;x.fillRect(i%36*99+S(i/t)*99,(i/36|0)*55+S(i*t)*99,w=1/C(i**3)*i/t/3e3,w))x.fillStyle=`hsl(${i/3},65%,${S(i*i)*34**(1+i%2)}%)`

Feb 23 2026 12:13 AM UTC

}// 140/140

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Abstract Blue Ink

u/ximavus

#randomnesspromax

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rodrigo.siqueira

remix of d/34888 by u/rodrigo.siqueira

function u(t) {

w=540
for(i=8e3;i--;)X=i%95*21,Y=i/95*20-w,x.fillStyle=`hsl(5,50%,${S(i*i+t)**33*70+75-((X-t%5*w+w)**2+(Y-w)**2)/w}%)`,x.fillRect(X,Y,21,20)

Feb 21 2026 12:14 AM UTC

}// 140/140

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Moving red creature

u/cantelope

mauve tho
u/ximavus

this looks like really light red

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tactical_retard

remix of d/23621 by u/tactical_retard

function u(t) {

eval(unescape(escape`󮌮󩭩󫍬󤽴󮝬󩜽󨍨󬽬󚌤󮽬󟝴󚬶󜍽󛌹󞜥󛌳󝜥󨌊󭽩󭍨󚍍󨝴󪌩󩭯󬬨󭼽󪜽󜭥󜼻󪜭󛜻󨝢󬼨󩬫󠼨󦜯󞜹󚜪󩬭󦌩󟭬󙭡󨭳󚍦󚽓󚍘󛼹󞜩󚭦󛝙󚜾󫌦󙭸󛭦󪝬󫍒󩝣󭌨󦌬󦜬󞜬󞜩󚝘󟜨󬬽󬭡󫭤󫽭󚜨󦜽󬬨󩬽󝜰󜌩󚭷󚜪󭼻`.replace(/u../g,'')))

Feb 20 2026 9:35 PM UTC

}// 120/140

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rodrigo.siqueira

remix of d/34881 by u/rodrigo.siqueira

function u(t) {

c.style.filter='invert()'
for(i=650;i--;x.fillRect(530+i%25*36,90+(i/25|0)*36,w=7,w))
x.fillStyle=`hsl(30,0%,${S(i**3+t)**33*190}%)`

Feb 13 2026 7:43 PM UTC

}// 132/140

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Minimalist blinking dots

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