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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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katkip

function u(t) {

for(j=11;j--;)for(i=20;i--;)x.beginPath(),x.fillStyle=`hsl(${(19*i^j*19)+t*49},99%,50%)`,x.arc(i*99,60+j*99,99-t*49,0,9),x.fill()

Nov 3 2020 11:04 AM UTC

}// 129/140

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#color

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ciaccodavide

function u(t) {

c.width|=1
x.font=`130px arial`
for(i=0;i<36;i++)
for(j=0;j<26;j++)
x.fillText('⏣',i*70+j*35-669,j*70+S(t+j/10)*10*j) // draw 50x200 rects

Nov 3 2020 8:18 AM UTC

}// 138/140

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Odog8

remix of d/20437 by u/Tesseract

function u(t) {

eval(a=unescape(escape`琿瀫㵃⠷⩰⤺瀽《渽挮睩摴栽ㄳ㌊搽⡡Ɫ⤽㹛愫⡯㵡ⴷ⵰⼱〩⨨欽⸱⼨漪漫截戩⤬戭截歝੦潲⡬㴱攴㭬ⴭ㬩砮晩汬剥捴⡪㵬╮Ⱪ㵬⽮ⰱⰨ䍛汝㵴㽤⠮⸮䍛汝⤺孩⼵ⱪ⼵崩嬱崩`.replace(/u(..)/g,"$1%")));throw a

Oct 30 2020 3:17 PM UTC

}// 134/140

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i made a cute little pseudo-random brownian noise, but it was still too big :/

u/Tesseract

I found a few ways to save space - your RNG now fits nicely, thanks :)
u/Odog8

No problem!

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ciaccodavide

function u(t) {

x.fillStyle='#3333'
x.fillRect(0,0,2e3,2e3)
x.font='29em"'
x.fillStyle='#fff'
x.fillText(String.fromCharCode(t*69),777+S(t)*99,666+C(t)*99)

Oct 28 2020 10:08 PM UTC

}// 139/140

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Chars

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ciaccodavide

remix of d/20421 by u/ciaccodavide

function u(t) {

r=Math.random()*10
c.style.background='linear-gradient(#e66,#99e)'
x.fillStyle='#fff1'
x.font='9em"'
x.fillText('【Ｇｒａｄｉｅｎｔ】',260+r,567+r)

Oct 28 2020 9:21 PM UTC

}// 139/140

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【Ｇｒａｄｉｅｎｔ】

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ciaccodavide

function u(t) {

q=Math.random()*4
X+=q<1?-1:q<2?1:0
Y+=q>3?-1:q>2?1:0
X=X<0?0:X>60?60:X
Y=Y<0?0:Y>30?30:Y
x.fillRect(X*32,Y*32,32,16)
}{d=b={}
X=30,Y=15

Oct 28 2020 6:52 PM UTC

}// 136/140

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Horizontal Drawing

u/ciaccodavide

#random

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danny@hille.dk

remix of d/5366 by u/hoplite

function u(t) {

x.fillStyle=`hsl(${t*99} 99%50%`
x.fillRect(C(t*99)*9+956,S(t*99)*9+536,12,12)
x.drawImage(c,-48,-27,2016+S(t*99),1134+C(t*90))

Oct 25 2020 11:21 PM UTC

}// 128/140

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rainbow vortex remix

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Xen

remix of d/14875 by u/Blacklink

function u(t) {

for(c.height|=i=345,x.lineWidth=k=3.14,p=S(t)-k;i--;x.stroke())x.beginPath(q=k*2/p*(i%p)),x.arc(960,540,i*k,q,q+k*3/p)

Oct 25 2020 2:47 PM UTC

}// 118/140

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play and golf

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geb

remix of d/20324 by u/ciaccodavide

function u(t) {

g=c.width=1920
n=13
for(i=0;i<g;i+=n){
z=S(t)*2/C(t/9+i)
a=i
b=1080-a*2
x.fillStyle=i%2>0?'#fff':'#aaf'
x.fillRect(b-a+a+z,a+z,b,b)
}

Oct 23 2020 12:12 PM UTC

}// 133/140

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danny@hille.dk

function u(t) {

for(m=Math,c.width=X=99;X--;)for(Y=66;Y--;)a=m.atan2(X-50,Y-30),x.fillStyle=R(X,S((a+S(m.hypot(X-50,Y-30)/-13+t))*5)*99),x.fillRect(X,Y,1,1)

Oct 20 2020 11:36 PM UTC

}// 140/140

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wonky spiral