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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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Tesseract

remix of d/8219 by u/Tesseract

function u(t) {

t||(p='m341 341',d=k=0)
for(i=x.lineWidth=4;i--;d+=(k++^k)+1&k?-1:1)p+=(d%2?"h":"v")+(d&2?"8":"-8")
x.stroke(new Path2D(p))//slow if in loop

May 24 2018 1:53 AM UTC

}// 140/140

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u/Xen

faster than mine :-O nice work

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Xen

remix of d/8153 by u/prplz

function u(t) {

r=Math.random
for(i=1e3;i--;x[y+C(t)*T&8^z+S(t)*T&8?'fillRect':'strokeRect'](y*T,z*T,T=44,T))y=r()*T,x.fillStyle=`hsl(${z=r()*T},70%,39%)`

May 20 2018 5:41 PM UTC

}// 138/140

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Shoutz 2 prplz

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firegodjr

remix of d/8134 by u/firegodjr

function u(t) {

x.font='3em x';r=Math.random;for(i=63;i--;x.fillText('◢◣◤◥'[r()*4|0],i*32,(t*5|0)*32))f=r(),x.fillStyle=R(l=(C(i/5)+(t-2)%6/2+f-.5)*255,l,l)

May 19 2018 1:28 AM UTC

}// 140/140

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Gradient triangles!

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Agnes

function u(t) {

for(c.width|=i=9;i--;)for(j=30,x.moveTo(e=100*(5+i+S(t)*3),500);j--;)x.lineTo(e+S(i*j+t)*j*1.6,500+C(i*j+t)*j*6.6);;x.stroke()

May 18 2018 1:46 PM UTC

}// 126/140

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Geometric default #default

u/Agnes

(Reuploaded to change a number from 4 to 5 to compensate for it skewing to the left)

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New_Core

remix of d/8051 by u/firegodjr

function u(t) {

for(c.width|=i=389;i--;x.stroke())x.beginPath(),x.arc(X=i%26*80,Y=~~(i/26)*80,70,0,7),x.fillRect(X-6-S(a=t*2+i/2)*70,Y-6+C(a)*70,12,12)

May 10 2018 9:44 AM UTC

}// 135/140

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Same.. but with 1 for loop and a centered square on the line

u/firegodjr

Excellent :D
u/magna

Wireframe version: d/8075

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markuspeitl

function u(t) {

x.beginPath()
X=t%20*150+200*S(t)
x.moveTo(X,1e3)
x.lineTo(X+600*S(t*1.5),0)
K=255
x.strokeStyle = R(K*T(t/2),K*S(t/2),K*C(t/2))
x.stroke()

May 7 2018 9:09 PM UTC

}// 139/140

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u/prplz

I love interference patterns!

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stxxl

function u(t) {

c.width=1920;for(i=1;i<=50;i++){ a=(3.14*2/50)*i; p=300.0/(300.0+500+S(t*2+a)*500); x.fillRect(960+C(t*2+a)*500*p,540+i*5*p,20,20);}

May 2 2018 12:44 AM UTC

}// 132/140

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MrM@_S

function u(t) {

eval(unescape(escape`挮睩摴栽琿㔷㨨堽䅲牡礨儽㠩Ɐ湫敹異㵥㴾⡑⬽攮步礩嬲崦☨塛欽縭兛㉝☷嵞㴨栽㌼㰨縭兛儽ㅝ☷⤩籨⼲ⱘ嬭繫嵞㵨☽栯㈬塛縭歝帽栩⤻景爨椽䬽㠻䬥㡼籩ⴭ㭋㵾ⵋ籼㠩塛楝☲⨪縭䬦♸⹦楬汒散琨䬪㐬椪㐬㐬㐩`.replace(/u(..)/g,"$1%")))

Apr 29 2018 7:16 PM UTC

}// 140/140

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[lights On] a variation of the lights off game. To play, enter an X coordinate (keys 1-8 on the keyboard), and then a Y coordinate (keys 1-8 on the keyboard). Your objective is to fill the entire board with black squares.

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trancor

function u(t) {

w=(c.width=999)/2;h=w/2;p=[];t/=8
for(j=12;j--;p.map((k,i)=>{x.moveTo(...z);x.lineTo(...k)}))
p.push(z=[S(t+j*4)*w+w,C(t+j)*h+h])
x.stroke()

Apr 27 2018 5:32 PM UTC

}// 140/140

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Thanks u/prplz for your golfing help to visualize bell numbers!

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anthonylewis

function u(t) {

p=6.2832,a=24,r=300;for(c.width|=i=0;i<a;i++)x.beginPath(),
x.arc(r*S(p/a*i*t)+960,r*C(p/a*i*t)+540,(i+10)*12,0,7),x.stroke()

Apr 25 2018 11:44 PM UTC

}// 125/140

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The Spiral Countdown?

u/zanella

Ok, "The Spiral Countdown" got my Awesome. :D