Dweets awesomed by u/Xen

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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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)

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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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rodrigo.siqueira

remix of d/33817 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert()sepia(`
for(a=b=t,i=3e4;i--;b=b/1.15-C(a*3),a+=(i/b&i%2)*2.9-b*S(a/2)/5-a*a/4.1)x.fillRect(a*1860,b*210+603,.1,t<2)

Mar 1 2026 1:11 AM UTC

}// 139/140

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Fractal fossil

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dee-gomma

function u(t) {

eval(unescape(escape`𛰪🎯DARTS🎯𚠯𭱩𭁨𚁸𚑦𫱲𚁩🐵𝠰𚠡𭀬𨐽𫐽𛠱𝐷𜀸𞱩𛐭𞱦𪑬𫀨𨑲𨰨𞐶𜀬𝐴𜀬𬠪𜠰𛁡𛁡𚰽𜠪𫐬𫑯𭡥𥁯𚀹𝠰𛀵𝀰𛁢𩑧𪑮𤁡𭁨𚁦𪑬𫁓𭁹𫁥👲🀲𯀨𩐽𬠽🐱𜱼𬠽🐲𜐩𙡩🰧𬡥𩀧𞡲🀳𯁥🰧𘰰𞐰𙰺嬈𙡲🀲𜠿𙰣𩡦𩠧𞠧𘰰𜀰𙰩𚐩𚐩𬠽𜁼𪐯𜠰`.replace(/u../g,'')))

Mar 1 2026 1:02 AM UTC

}// 140/140

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Dartboard 🎯

u/ximavus

These normally take a ton of code congrats

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KilledByAPixel

function u(t) {

c.width|=w=99
for(i=13;i--;)for(j=12;j--;)x.fillRect(i&&(2*i-4+j%2+(j%4<3?j%4:1)*t/3%2)*w,j*w,i?w:3e3,i?w:5)

Feb 22 2026 5:33 AM UTC

}// 108/140

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Café Wall Illusion ☕

u/KilledByAPixel

https://en.wikipedia.org/wiki/Caf%C3%A9_wall…
u/ximavus

I've seen this illusion so many times and it still works
u/KilledByAPixel

#illusion

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kruno.ooo

function u(t) {

FPS=9+99*(Date.now(performance=setStatsVisibility(~(n=>(d=(s=stats).dom).style.left=~~s.setMode(d.children[n].style=n))(frame<79|0)))/1e3&1)

Jan 9 2026 11:43 AM UTC

}// 140/140

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DNA #stats

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lewdev

remix of d/34648 by u/ximavus

function u(t) {

eval(unescape(escape`󮌮󩭯󫭴󟜢󜭣󫜧󘬻󫜽󨬽󟭸󛭦󪝬󫍓󭍹󫍥󟝢󒭦󫽲󚍩󟜹󞽩󛜭󞼩󪜿󫝠󬭥󩍠󞭭󨍢󫍵󩝠󛍸󛭦󪝬󫍒󩝣󭌨󜌬󚍩󟽩󚬱󝬶󞬭󞌸󚜭󜜶󝬬󪜿󜭥󜼺󞜰󜌬󪜿󞌸󞬸󝌰󚜊󫝠󘽦󩭦󨌻󩭯󬬨󪬽󞜻󪬭󛜻󚝸󛭦󪝬󫍔󩝸󭌨󙽜󭜲󝬰󝜠󘌠󘌠󙼮󬭥󬍥󨝴󚍪󙜲󟼵󞬶󚜬󪬥󜬿󞜹󞬲󜌬󪬪󝬰󚼷󜌩`.replace(/u../g,'')))

Dec 26 2025 4:59 AM UTC

}// 140/140

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USA Flag (see also d/14922 and d/34632, used capjs for compression)

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u/ximavus

way better than mine I can say. Congrats
u/cantelope

white nationalists have entered the chat
u/ximavus

wait did the feed pop me this dweet twice or its uploaded twice with the same comments?
u/joeytwiddle

The feed can pop a dweet twice, I think if someone posts a new dweet while you are scrolling
u/ximavus

Oh ok :)
u/lewdev

Sorry, if this post appeared political, I was inspired to implement it based on other dweets. Specifically d/34632 which does the basic parts of the flag with very few characters.

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KilledByAPixel

remix of d/14922 by u/KilledByAPixel

function u(t) {

for(i=9;i--;)x.fillRect(0,(i-1)*167,i?2e3:750,i?83:700)

Dec 20 2025 4:09 PM UTC

}// 55/140

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The Redacted States of America ⬛

u/ximavus

as a nonamerican i dont exactly understand
u/ximavus

ah wait I get it
u/KilledByAPixel

wait, how did you know this is american flag?
u/ximavus

the redacted states of America. its similar
u/cantelope

$3,000 USD reward for information leading to the arrest of this dweet's author

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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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rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert(`:𝕏=X=Y=0
for(i=8e4;i--;𝕏=X,x.fillRect(3500+Y*5e3,1350+X*4e3,t<1,.1))
X=S(X*X-Y*Y+0.03),
Y=C(2*𝕏*Y+1.929)

Nov 3 2025 6:34 PM UTC

}// 130/140

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The mysterious Simone Attractor (a=0.03, b=1.929) #attractor

u/ximavus

eeeerieeee
u/magna

I audibly said, "wow..."

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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

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