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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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Xen

function u(t) {

x.drawImage(c,0,9)
for(i=222;i--;x.fillRect(i*9,5,4,9))x.fillStyle=`hsl(${T(t&i*t)*1e3+t*99},99%,40%)`

Mar 7 2021 1:25 PM UTC

}// 102/140

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BenjiHasCode

remix of d/21838 by u/lerc

function u(t) {

c.width=w=90;x.fillRect(0,0,90,9);for(i=4e3;i--;)x.fillRect(X=i%(w+8),Y=i/w+8,5*S(i+t)-4,1),x.fillStyle=`hsla(${220-Y*t},40%,40%,${T(i**4)}`

Mar 6 2021 1:39 PM UTC

}// 140/140

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pbjer

function u(t) {

c.width=1920
x.font='84px sans'
T=Math.floor(t)
f='fizz'
b='buzz'
s=()=>T>0?T%15===0?f+b:T%5===0?b:T%3===0?f:T:T
x.fillText(`${s()}`,0,550)

Mar 1 2021 10:57 PM UTC

}// 139/140

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Rendered fizzbuzz

u/DaSpider

f='fizz',b='buzz',document.write(((T=t?T+1:1)%15===0?f+b:T%5===0?b:T%3===0?f:T)+', ') // a bit faster

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erin

function u(t) {

for(d=i=540;i--;)x.fillRect(i*100+(25*t&frame/15)*25,d*t,45,9)

Mar 1 2021 3:27 PM UTC

}// 63/140

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bitwise is pretty fun!

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motyar

function u(t) {

for(c.width|=i=384;i--;x.fillText(...k?['www',700+C(t*99)*9,600+S(t*57)*9]:['🥚',C(i)*2e3,(i+t)*99%2e3-99]))x.font=(k=i==99)?"9cm A":"5cm A"

Feb 27 2021 4:06 AM UTC

}// 139/140

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BackendForth

function u(t) {

f=Math.random
d=999
if(!t)a=b=0
x.fillRect(a,b,3,3)
s=f()
if(s<.3){a/=2;b/=2}
else if(s<.6){a=(a+d)/2;b/=2}
else {a=(a+d)/2;b=(b+d)/2}

Feb 26 2021 6:46 PM UTC

}// 134/140

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BackendForth

function u(t) {

x.fillStyle=R((S(t*5)+1)*99,S(t*7)*91+50,S(t*3)*77+99,.1)
for(i=-9;i<990;i++){q=S(3*t+i/9)*99
x.fillRect(i*9+q*3,500-q*3*S(t),9,q*6*S(t*t))}

Feb 26 2021 6:34 PM UTC

}// 140/140

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Odog8

remix of d/21751 by u/Pascal

function u(t) {

c.width=200
t?0:(a=2**.5,b=0,p=2+a)
A=a**.5
at=A/2+.5/A
bt=(1+b)*A/(a+b)
pt=(1+at)*p*bt/(1+bt)
a=at
b=bt
p=pt
x.fillText(p,5,10)

Feb 25 2021 4:17 PM UTC

}// 128/140

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QUADRATIC CONVERGENGE

u/Odog8

FAST aaaaagughghh

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rodrigo.siqueira

remix of d/21736 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,2e3,2e3),i=w=400;i>-400;i--,x.clearRect(960+i+S(i/50-t)*w,540+350*S(i/40)*C(t/3+S(i/9+t))*S(t+i/99),6,6))x.globalAlpha=.1

Feb 22 2021 12:42 PM UTC

}// 140/140

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Flow of waves

u/EliteDaMyth

eval(unescape(escape𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛀲𩐳𛀲𩐳𚐬𪐽𭰽𝀰𜀻𪐾𛐴𜀰𞱩𛐭𛁸𛡣𫁥𨑲𤡥𨱴𚀹𝠰𚱩𚱓𚁩𛰵𜀭𭀩𚡷𛀵𝀰𚰳𝐰𚡓𚁩𛰴𜀩𚡃𚁴𛰳𚱓𚁩𛰹𚱴𚐩𚡓𚁴𚱩𛰹𞐩𛀶𛀶𚐩𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠱.replace(/u../g,''))) is 113 chars :)
u/EliteDaMyth

oops i f'ed the formatting in the above comment. eval(unescape(escape`𩡯𬠨𮀮𩡩𫁬𤡥𨱴𚀰𛀰𛀲𩐳𛀲𩐳𚐬𪐽𭰽𝀰𜀻𪐾𛐴𜀰𞱩𛐭𛁸𛡣𫁥𨑲𤡥𨱴𚀹𝠰𚱩𚱓𚁩𛰵𜀭𭀩𚡷𛀵𝀰𚰳𝐰𚡓𚁩𛰴𜀩𚡃𚁴𛰳𚱓𚁩𛰹𚱴𚐩𚡓𚁴𚱩𛰹𞐩𛀶𛀶𚐩𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠱`.replace(/u../g,'')))

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Xen

remix of d/21726 by u/rodrigo.siqueira

function u(t) {

for(c.width=i=1e3;i--;x.arc(500,300,i,K=i**(1.01+t/3e2),K));x.stroke()

Feb 21 2021 2:01 PM UTC

}// 70/140

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quick play