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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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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danny@hille.dk

remix of d/27874 by u/danny@hille.dk

function u(t) {

w=c.width=128;for(i=1e4;i--;)x.fillRect(X=i%w,Y=i/w|0,s=Math.hypot(X-64-C(t*1.5)*40,Y-36-S(t*2)*28)/w*((X^Y)%9&3)**2,s)

Jun 3 2023 7:41 PM UTC

}// 119/140

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Golfed + more complex pattern

u/danny@hille.dk

If you want to see something weird, plug this in: 'x.fillStyle=R(0,0,s*w)' after the ; in the for loop.
u/joeytwiddle

Very nice

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KilledByAPixel

remix of d/26625 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󨼮󬽴󮝬󩜮󩭩󫍴󩝲󟜧󬽥󬍩󨜨󚝩󫭶󩝲󭌨󙼊󮬽󞌰󜌫󭌪󜽥󜼊󩭯󬬨󪜽󝝥󜼻󭌼󝌦󙭩󛜭󞽸󛭦󪝬󫍒󩝣󭌨󪜬󮬾󭝛󪝝󟽺󞭵󦽩󧜬󛬲󛍺󚜩󩌽󪜪󚬮󝜪󜬰󛍺󚼽󠼨󪜪󪜪󮬩󚬲󛍴󟽸󛭦󪝬󫍒󩝣󭌨󦬽󜜳󜌰󚽤󚭓󚍡󟝩󚬪󜼫󭌯󝜰󚜬󦜽󝜰󜌫󩌪󠼨󨜩󛍓󚍩󚜯󝌬󦜼󭝛󦭼󜍝󚜺󭝛󪝝󟝺`.replace(/u../g,'')))

Jun 2 2023 4:26 AM UTC

}// 140/140

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Observatory 🔭

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rodrigo.siqueira

remix of d/27472 by u/Xen

function u(t) {

c.width|=0
for(K=i=2e3;i--;)x.fillRect(i*1,1080,1,S(i/130-T(t/2-i/K+1)/4)*99-3e3/(S(i/9+S(i/88+t)*5*S(i/20+t)+S(i-t*3)/9)+C(i*9-t)/t/t/t+9))

Apr 30 2023 2:40 PM UTC

}// 140/140

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Pulse of T(t/2-i/K+1) waves

u/Xen

nicely done!

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rodrigo.siqueira

function u(t) {

for(x.fillRect(x.globalAlpha=.04,0,i=2e4,i);i--;)x.clearRect(960+T(p=C(i**3)*2)/(Z=T(i/99-t)/99),540+C(p)/Z,S(i+t),.5)

Apr 28 2023 6:09 PM UTC

}// 118/140

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Needles of light

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New_Core

function u(t) {

t?c.width|=0:a=1
with(x)font="6cm '",t>9?a*=1.03:fillText(9-~~t,99,300),roundRect(960,300-a,99,690,[50,50,0,0]),rect(1070,340,99,650),fill()

Apr 17 2023 5:33 PM UTC

}// 140/140

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u/deobfuscate

I know this could be improved. Really cool idea and it shouldnt go to waste here!

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danny@hille.dk

remix of d/27369 by u/danny@hille.dk

function u(t) {

for(c.width|=i=48;i-->1;)for(j=26;j--;x.beginPath(x.fill()))x.arc(i*42,j*42,S(((j-i/2)^(j+i/2))+t)*11+11,0,7)

Apr 13 2023 3:41 PM UTC

}// 109/140

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bubble XOR remix

u/joeytwiddle

I am liking #pattern
u/joeytwiddle

Same code: https://tixy.land/?code=.5%2Bsin%28%28%28y-x…
u/joeytwiddle

Different code: https://tixy.land/?code=sin%28%28%28x*2-y%29…

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taupelink

remix of d/27355 by u/taupelink

function u(t) {

eval(unescape(escape`景爨椽㠴〬欽ㄸ〻椭ⴾ琪㉥㌻砮晩汬⠩⥸⹢敧楮偡瑨⡸⹦楬汓瑹汥㵒⡩┱㘪ㄲⱫ⭩┱㈪㔬椯㌬⸳⬱╴⤩ⱸ⹡牣⡘㵩┱㈪欬夽椥㜪欬椯㄰⽴⨪琬樽椯㈵ⱪ⬲ⴳ⩴⤬氽㤰⵫⨪琬砮獴牯步剥捴⡘⵬ⱙ⵬ⱬ⨽㈬氩`.replace(/u([^D].)/g,'$1%')))

Apr 10 2023 7:29 PM UTC

}// 140/140

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d/27360

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rodrigo.siqueira

remix of d/27266 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=1e4;i--;x.fillRect(99*X,98*Y,f&1,t<9))X=i*i*t%20,Y=X*i*t%11,f=X+4*C(S(Y+390/Y)+X),x.fillStyle=R(f*f,f*9,Y*9)

Mar 30 2023 1:14 PM UTC

}// 139/140

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Ripples and reflections in mathematical waters

u/jdspugh

Cool
u/joeytwiddle

#water #ripples

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vgel

remix of d/27290 by u/vgel

function u(t) {

eval(unescape(escape`景爨眽瀽挮睩摴桼㵈㵍慴栮桹灯琻瀫㴲㜹ⱘ㴨儽瀥眩⼱攳ⴱⱙ㴨圽瀯睼〩⼵〰ⴱⱰ㰲收㭸⹦楬汒散琨儬圬猽㘰⽩ⱳ⤩景爨娽椽䐽ㄻ⬫椼㤦䐾⸱㬩娭㵄㵈⠨䠨⡃⡴⤪堭匨琩⩚⤬天⴮㐩Ⱘ䌨琩⩚⭓⡴⤪堩⤭⸱`.replace(/u([^D].)/g,'$1%')))

Mar 29 2023 7:06 PM UTC

}// 140/140

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dithered donut #sdf

u/vgel

got inspired by d/16174 for some ways to shrink it further :-)
u/Xen

shaved a few: for(w=p=c.width|=H=Math.hypot;p+=279,X=(Q=p%w)/1e3-1,p<2e6;x.fillRect(Q,W,s=60/i,s))for(Z=i=D=1;++i<9&D>.1;)Z-=D=H((H((C(t)*X-S(t)*Z),(W=p/w)/500-1)-.4),(C(t)*Z+S(t)*X))-.1
u/joeytwiddle

Nice effect!

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rodrigo.siqueira

remix of d/27135 by u/danny@hille.dk

function u(t) {

for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-k*62))I=i%2e3,X=I/28|0,k=S(i*i+t)*2+2|0,x.fillRect(X*37,I%28*39,30,30)

Mar 2 2023 12:25 PM UTC

}// 123/140

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Red pixel interaction

u/rodrigo.siqueira

Two code golf tricks here: x.fillRect(0,0,i=2e3,i*!t)
u/danny@hille.dk

nice trick i*!t!!!! - slight golf: 111b for(x.fillRect(0,0,i=2e3,i*!t);i--;x.fillStyle=R(235-(S(i*i+t)*2+2|0)*62))x.fillRect(37*(i/28|0),i%28*39,30,30)