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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: #Opposites

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taupelink

remix of d/29809 by u/taupelink

function u(t) {

a=x=>(x*x)**.6;f=u=>a(a(u%4-2)-2-(Y>>i%3+5));g=n=>f(X/n)+f(Y/(n^1))&2;for(i=1e4;i--&&t<4;x.fillRect(5*X,5*Y,g(3),g(2)))X=i*i*t%384,Y=X*i%216

May 22 2024 12:53 AM UTC

}// 140/140

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d/31841

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Agnes

remix of d/24213 by u/magna

function u(t) {

E="🤣"
eval(unescape(escape`𩡯𬠨𬠽𣑡𭁨𛡲𨑮𩁯𫐬𫐽𜠵𞱭𛐭𞱸𛡦𪑬𭁥𬠽𘡨𭑥𛑲𫱴𨑴𩐨𘠫𪠫𘡤𩑧𚐢𛁸𛡦𪑬𫁔𩑸𭀨𡐬𩐪𝀸𜀬𩠪𝀸𜠩𚑦𫱲𚁥👲𚁦👲𚁡👢🐰𚐪𞐯𝀩𚠴𛁘👥𛐲𛠸𛁙👦𛐹𛰸𛁪🐹𞐹𞱡𚡡𚱢𚡢🀽𝀦𙡪𛐭𞱳🐹𞐹𛱴𚑛𨐬𨡝👛𨐪𨐭𨠪𨠫𦀬𜠪𨐪𨠫𦑝`.replace(/u../g,'')))

May 21 2024 9:35 AM UTC

}// 140/140

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lmaondelbrot

u/Agnes

#mandelbrot (alternative title: roflbrot)
u/Agnes

I couldn't fit in scaling by "s", either via x.font or via x.setTransform or x.scale. This is also broken on iOS Safari because x.filter needs the trailing semicolon on that browser.

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taupelink

remix of d/29638 by u/taupelink

function u(t) {

f=u=>((u%8-4)**2/j-4)**2/j;g=n=>f(X*n/8)+f(Y-Y*n/8)&4;for(i=2e4;i--;x.fillRect(498+4*X,28+4*Y,t<g(j=2+i%1.5),t<g(8-j)))X=i*i*t%256,Y=X*i%256

May 20 2024 11:33 PM UTC

}// 140/140

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d/31832

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cantelope

remix of d/31825 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`景爨琪㵮㴹㭴㱮☦渭ⴻ琫㴱⼶〩景爨猽琿猯⸹㤷㨹Ⱪ㴱㤹㭩ⴭ㬩景爨樽㄰㈻樭ⴻ琼⡩⼱㕼樯ㄵ⤥㘫ㄦ♸⹦楬汒散琨⡩ⴹ㤩⩳⬹㘰Ⱘ樭㔱⤪猫㔴〬猬猩⥸⹦楬汓瑹汥㵒⡶㴨橼楼琪㜩┷⩴⨹ⱶⱶ⤠`.replace(/u([^D].)/g,'$1%')))

May 20 2024 5:41 PM UTC

}// 135/140

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9x draw speed :D

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taupelink

remix of d/31734 by u/taupelink

function u(t) {

f=(u,m=i&9)=>(m?f(u,m-1)-m:u%4-2)**2/4;g=n=>f(X*n/4)+f(Y-Y*n/4)&5;for(i=1e4;i--&&t<4;x.fillRect(20*X,20*Y,g(1)&g(3),g(2)))X=i*t%96,Y=X*i%54

May 19 2024 9:52 PM UTC

}// 139/140

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d/31823

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warbino

remix of d/31786 by u/lewdev

function u(t) {

x.font='4cm"'
x.fillText('🐰',0+10*S(50*t),600)
x.drawImage(c,300,90,1000,900)

May 16 2024 5:33 PM UTC

}// 77/140

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thenize

remix of d/379 by u/iverjo

function u(t) {

c.width=960;for(i=2e3;i--;)s=7/(S(i/42)*S(39*i+t-1.57)+2),x.fillRect(i+460*S(i/200)*S(2.79*i+t),270+160*(C(i/42)+T(t/+i/5)),s,s)

May 16 2024 5:12 PM UTC

}// 128/140

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u/warbino

awesome!

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thenize

remix of d/31778 by u/thenize

function u(t) {

for(i=k=900;--i;x.fillRect(Z=k+S(i)*Y*i,k+S(Z)*i,q*Y,Y*i/134))f=i*t,X=f%3-1,Y=X*f%7-2,x.fillStyle=R(q=i*X-033,q*=X+.6,q*=Y**2/10)

May 15 2024 5:04 PM UTC

}// 129/140

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u/warbino

awesome!

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384.cz

function u(t) {

c.width|=0
f=_=>(i^i+frame)^(_*i)^(99*S(i))
for(i=199;i--;)x.fillRect(f(8)%2e3,f(4)%1E3,f(2)%49,f(1)%99)

May 14 2024 3:39 PM UTC

}// 104/140

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A City

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KilledByAPixel

function u(t) {

n=frame
x.strokeStyle='#'+n
for(j=0;j<50&&n<1e6;)for(x.lineTo(j++*40,1e3-Math.log(i=a=n)*70),n=0;i--;)a%i?0:n+=i
x.beginPath(x.stroke())

May 3 2024 6:55 PM UTC

}// 136/140

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Aliquot Sequences - Log Graph

u/KilledByAPixel

more info: https://youtu.be/OtYKDzXwDEE?si=B8Gg8rbmDLTk…