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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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bencoveney

function u(t) {

for(c.width|=i=j=k=0;i<99;i++,j=i*13,k=S(i/2-t)*i+99,x.fillStyle=R(k))x.fillRect(960-j/2,j-k,j,99)

Nov 3 2019 12:35 AM UTC

}// 98/140

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Ribbon

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DataMeta

remix of d/16202 by u/DataMeta

function u(t) {

r=Math.random;with(x)for(j=560;j--;)fillStyle=R(a=255-r()/r()/r(),a/4,a/(3+S(t)),1-a*.0036),fillRect(64*(j%31),64*(j/31|0),d=86*r(),d)

Nov 2 2019 11:20 PM UTC

}// 134/140

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bencoveney

function u(t) {

with(x)for(a=i=0,j=200,fillStyle='#fff',fillRect(0,0,2e3,199),drawImage(c,0,1);i<j;i+=20,a=i+S(t)*60,fillStyle=R(a))fillRect(400+a*5,0,50,j)

Nov 2 2019 10:25 PM UTC

}// 140/140

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#default wavey red lines

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bencoveney

remix of d/16489 by u/bencoveney

function u(t) {

with(x){fillStyle="#222"
fillRect(0,0,2e3,2e3)
fillStyle="#fff"
font="5em Courier"
u+=i=""
u.split`
`.map(l=>fillText(l,i++%8==0||99,i*99))}

Nov 2 2019 4:11 PM UTC

}// 140/140

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nicer #quine formatting

u/metamero

cool! <3 quines

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Xen

function u(t) {

for(i=2e3;i--;x.fillRect(i,0,2,9))x.fillStyle=`hsl(${i/5+C(i+t*49)*99},69%,50%)`;x.drawImage(c,0,9)

Nov 2 2019 4:03 PM UTC

}// 99/140

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LSD #trippy #rainbow

u/katkip

#xweet

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bencoveney

remix of d/16488 by u/bencoveney

function u(t) {

x.font="4em monospace"
u+=i="";
u.split`
`.map(l=>x.fillText(l,i++%5==0||99,i*99))

Nov 2 2019 2:29 PM UTC

}// 82/140

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more #quine crunching

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bencoveney

remix of d/16359 by u/bencoveney

function u(t) {

x.font="4em monospace";(u+"").split(`
`).forEach((l,i)=>x.fillText(l,i%3==0||99,(i+1)*99))

Nov 2 2019 2:01 PM UTC

}// 90/140

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improved quine

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bencoveney

function u(t) {

for(x.drawImage(c,0,1),i=0;i<999;i++,x.fillStyle=`hsl(${S(t)*i},70%,50%`,x.fillRect(i*2,0,2,1));

Nov 2 2019 1:54 PM UTC

}// 96/140

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learning some better minification techniques

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katkip

function u(t) {

r=Math.random;t||(I=O=0);for(i=19999;i--;){X=r()*1e3,Y=r()*1e3;if(((X-500)**2+(Y-500)**2)**.5<500)I++;else O++}throw(I/O*4)/(1+I/O)

Nov 2 2019 1:13 PM UTC

}// 131/140

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pi approximation! I think I just discovered a new method

u/KilledByAPixel

it's called the monte carlo method
u/katkip

nooo.... :(
u/pavel

d/10725

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katkip

remix of d/16446 by u/katkip

function u(t) {

c.width*=1;for(i=45;i-->-45;)for(j=45;j-->-45;)x.fillStyle=`hsl(${f(i,j)} 99%50%)`,x.fillRect(900+i*10+S(t)*20+j*3,500+j*4-f(i,j),10,10)

Nov 2 2019 9:32 AM UTC

}// 136/140

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f=(X,Y)=>S(X/9+t*9)*C(Y/9+t*9)*40+40/i/j*20 3d plotter