Top dweets of all time

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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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!
u/AntiqueTurtle

I feel like this is a visual representation of how gravity works or dark matter. Very "physics". I love this one.

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KilledByAPixel

remix of d/32945 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󩭯󬬨󨼮󭽩󩍴󪌽󭼽󞜹󛍩󟜶󩜳󞽩󛜭󞽸󛭦󪝬󫍓󭍹󫍥󟝒󚍚󛝙󚬵󛍚󛼮󝬬󦬩󛍸󛭦󪝬󫍒󩝣󭌨󪜥󭼬󪜯󭽼󜌬󜜬󜜩󚝦󫽲󚍘󟝙󟝚󟝢󟜮󜼭󪜯󝍥󜼬󨜽󪜥󭼯󝜰󛜱󞼫󚽚󟍷󚽘󛼲󙬦󚍺󟝚󚽴󚭷󛍙󛝢󟌲󝬭󤼨󦌯󞝼󮬯󞜩󚬪󜜳󚬲󝍼󦌦󦜭󜬶󙭺󙬱󝜩󯍼󨜭󜜦󙬨󨜽󨬽󜜩󞽙󛜽󨬩󦌫󟝡`.replace(/u../g,'')))

Aug 4 2025 2:50 PM UTC

}// 140/140

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Flight Over Destroyed City ✈️

u/cantelope

i love the smell of sulfur and uranium in the morning
u/ximavus

yeah better than pure air

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tomxor

remix of d/33915 by u/KilledByAPixel

function u(t) {

for(X=Y=i=3e4;i--;x.fillRect(~x.clearRect(960+240*X,540+240*Y,1,.3),i,2e3,!t||.04))j=i>>i/2e3,X=C(a=Y+j)+C(b=X+j*(t/999+9)),Y=S(a)+S(b)

Jun 5 2025 9:29 PM UTC

}// 135/140

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Evolving Bubble Universe

u/magna

So cool!
u/aaaaaz

#moon

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danny@hille.dk

remix of d/33574 by u/danny@hille.dk

function u(t) {

for(w=i=1080;i--;)(S(i)*w|0)+8*t&1&&(x[r='fillRect'](m=i*30+t*120-w,t*120,4,4),x[r](m,w-t*120,4,4))

Apr 9 2025 3:01 PM UTC

}// 99/140

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Hitomezashi Stitch Remix

u/cantelope

wow
u/danny@hille.dk

94b -> for(w=i=1080;i--;T=t*120)(S(i)*w|0)+8*t&1&&(x[r='fillRect'](m=i*30+T-w,T,4,4),x[r](m,w-T,4,4))
u/ximavus

I like the maze idea

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Agnes

remix of d/32040 by u/Agnes

function u(t) {

F=0
M=()=>(D=t-i)>0?D*150*T(i*j*F++):0
for(c.width|=i=0;i++<9;)for(j=1e3;j--;)x.fillRect(5*(j%10)+100*(i+4+3*S(t))+M(),400+j/5+M(),5,2)

Sep 10 2024 11:48 AM UTC

}// 135/140

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#default target practice

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u/magna

Awesome!
u/neimad

Amazing
u/tomxor

nooooooooo
u/aleamb

yeaaaah!
u/kurobaaka

wow
u/KilledByAPixel

https://www.reddit.com/r/tinycode/comments/1…
u/joeytwiddle

pow!

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KilledByAPixel

remix of d/27043 by u/KilledByAPixel

function u(t) {

t?x.fillRect(X*Z,i,Z,Z):(X=Y=Z=32,V=W=.4)
F=_=>u[i=X+(Y<<4)]?1:u[i]=-1
X+=V*=F(X+=V),Y+=W*=F(Y+=W)
x.clearRect(X*Z,i,Z,Z)

Jan 30 2024 10:12 PM UTC

}// 121/140

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Micro Breakout

u/Xen

nice!

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rodrigo.siqueira

remix of d/28286 by u/UEZ

function u(t) {

for(c.width=X=256;X--;)for(Y=0;Y++<143;x.fillRect(X,Y,h/d/7,1))for(d=-9;d--,!((h=d+2**16+(d*(80*C(t)-X)+4e3*t&d*(Y-S(t)*d)+2e4)>>9&d)&8););

Aug 13 2023 6:54 PM UTC

}// 139/140

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#Sierpinski #City

u/Xen

love it!

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KilledByAPixel

remix of d/16105 by u/KilledByAPixel

function u(t) {

for(i=850;t<6.3&&i--;x.fillRect(960+r*S(a=(i%2-.5)*t-7),960-i-99*C(a),9,3))r=350+99*S(i/139),x.fillStyle=R(q=i/2+r+t*50-650,q*=C(i/9^t*9),q)

Jul 29 2023 5:04 PM UTC

}// 140/140

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Improved 3D Vase ⚱️

u/danny@hille.dk

IKEA style -> for(i=850;t<6.3&&i--;x.fillRect(960+r*S(a=(i%2-.5)*t-6),960-i-110*C(a),9,3))r=300+99*S(i/139),x.fillStyle=R(q=r+t*66-500-S(t/r^i/9)*99,q,q)
u/joeytwiddle

#vase #model
u/vain

cool. i like even the IKEA style - awesome stuff

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KilledByAPixel

function u(t) {

eval(unescape(escape`󩭯󬬨󭌿󥌫󚼥󦬿󫼫󟝡󚼽󚍢󛝡󚜯󞜹󞭢󟝃󚍔󚭔󚜪󜬺󫼽󨜽󨬽󥌽󜌬󨼮󭽩󩍴󪍼󟝳󟜹󛍘󟝩󟜹󝬰󞽩󛜭󞽳󚬽󛬹󞜩󮍛󩬽󙽦󪝬󫍒󩝣󭌧󧜨󪜪󜬬󦬽󜬸󜜬󜼬󛜨󚍩󚽯󚬵󟬾󝌩󚬪󝌩󙜹󞜩󛍸󦽦󧜨󚍘󚼽󨜩󛝳󚬹󞜪󚍩󙜲󚜬󪜪󬼯󞜫󦬬󬼪󚌨󥌯󜬭󪜯󜜹󯌰󚜥󝜦󙭩󙜲󟼹󞜺󞌹󚜬󬼪󞜩`.replace(/u../g,'')))

Jan 28 2023 10:56 PM UTC

}// 140/140

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Retro Racing 🏎️

u/vain

Holy shit! What a genius retro racing dwittro entry! 😃👍
u/kokot

for(t?T++%Z?o+=a+=(b-a)/99:b=C(T*T)*2:o=a=b=T=0,c.width|=s=9,X=i=960;i--;s*=.99)x[f='fillRect'](i*2,Z=281,3,-((i+o*5>>4)**4)%99),x[f]((X+=a)-s*99*(i%4),i*s/9+Z,s*((T/2-i/19|0)%5&&i%2?99:89),s*9) this actualy makes two way road
u/aleamb

fucking awesome
u/joeytwiddle

#road