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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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rodrigo.siqueira

remix of d/34538 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*5e3-1750,-99-Y*6e3,t<2,.1))X=T(X*X-Y*Y*.2)%(9/t)+.259,Y=C(2*𝕏*Y+1.8)

Nov 19 2025 2:31 PM UTC

}// 134/140

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Hidden creatures

u/ximavus

ooh

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ximavus

function u(t) {

for(i=60;i--;){d="VannaZZZZZZZZZZZZZZZZZZpzzzzzzzzzzzp     ZbgggggbZ".charCodeAt(i);x.fillStyle=R(v=d/.6,v,v);x.fillRect(i*32,540-d,32,2*d)}

Nov 17 2025 12:31 PM UTC

}// 140/140

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Yes! Ray casting! change the d variable to change the world (encoded in char codes)

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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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rodrigo.siqueira

remix of d/34491 by u/rodrigo.siqueira

function u(t) {

t?c.style.filter=`invert(`:𝕏=X=Y=0
for(i=5e4;i--;𝕏=X,x.fillRect(3e3+Y*4e3,1100+X*3e3,t<.9,.1))X=S(X*X-Y*Y+44),Y=C(2*𝕏*Y+1.92)+T(i)/1e4/(t-1)

Nov 5 2025 2:30 PM UTC

}// 140/140

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Double vortex #attractor

u/ximavus

woah

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ximavus

function u(t) {

c.width|=0
F=_=>(X&Y+99*t)
for(X=120;X--;)for(Y=120;Y--;)if(F())x.fillRect(X*16,Y*9,16,9)

Nov 3 2025 3:22 PM UTC

}// 89/140

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Sierpinsky triangle

u/ximavus

Its binary counting on pixels basically
u/ximavus

also I saw the F=_=>() formula trick from u/KilledByAPixel's dweet that was a pottery simulator that I can't find

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ximavus

remix of d/34226 by u/KilledByAPixel

function u(t) {

with(x)for(t||translate(960,540),j=6;j--;)for(i=95;i--;fillRect(-T/2,T*S(i+i*t/T),T=4e3,5))fillStyle=`hsl(${i*t} 99%${i}%`,rotate(Math.PI-1)

Oct 26 2025 2:14 PM UTC

}// 140/140

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actually I remixed it accidentaly

u/ximavus

most credit to u/KilledByAPixel
u/ximavus

well all of the credit

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rodrigo.siqueira

remix of d/34430 by u/rodrigo.siqueira

function u(t) {

c.width|=c.style.filter=`invert()`
for(i=190;i--;)x.fillRect(940+S(T(i+4)*i)*6*(k=1.005**i**((t+i/9)%9/6+1)),540-(T(i))*k,k/3,k*2)

Oct 19 2025 5:08 PM UTC

}// 130/140

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#default space warp

u/joeytwiddle

My God, it's full of monoliths!
u/ximavus

"Were currently traveling through the monolith belt and reaching Jupiter soon"

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WowzerW

function u(t) {

for(i=0;i<999;i++)x.fillStyle=`hsl(${t*99+i},99%,50%)`,x.fillRect(960+600*Math.sin(t+i/9)/i*9,540+600*Math.cos(t+i/9)/i*9,3,3)

Oct 16 2025 8:53 PM UTC

}// 126/140

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I am new and Hello World!

u/ximavus

Welcome to the dwitter community!

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marquisdegeek

remix of d/34416 by u/marquisdegeek

function u(t) {

eval(unescape(escape`󥼽󞜶󜌬󭌿󫽮󫝯󭝳󩝭󫽶󩜽󩜽󟭻󦌽󩜮󮌪󨼮󭽩󩍴󪌯󪝮󫭥󬭗󪝤󭍨󛝗󯜺󦌽󜌻󩭯󬬨󨼮󭽩󩍴󪍼󟝩󟜹󞽩󛜭󞽸󛭦󪝬󫍒󩝣󭌨󜌬󥼫󝼪󪼬󥼪󜬬󪼩󚝫󟜲󚬪󪜪󚌨󚍴󟌲󟽴󛼴󞬱󚜪󭌥󜜩󚬪󜜮󜜸󚼱󚜬󮌮󩽬󫽢󨝬󠝬󬍨󨜽󪼯󜬰󛍸󛭦󪝬󫍒󩝣󭌨󥼫󦌯󜜰󜌪󪼬󥼭󝼪󪼬󝌪󪼬󞜪󪼩󞼻`.replace(/u../g,'')))

Oct 14 2025 7:25 AM UTC

}// 140/140

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Adding fogging for distance

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lewdev

remix of d/34376 by u/lewdev

function u(t) {

b=t*5%12
i=~~(t*5/12)%9
x.font="2in'"
x.fillText([..."🃏🎴"][i%2],b/3%9*(i>3?-300:300)+i*200,1050-1/b*Math.abs(S(b))*900+i)

Oct 10 2025 2:35 AM UTC

}// 121/140

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🃏🎴 Solitaire win screen! Credit to u/DasSchafImWolfspelz in d/4368

u/joeytwiddle

Great #tribute! #solitaire
u/ximavus

nice!