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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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ebiester

remix of d/4251 by u/ebiester

function u(t) {

c.width=w=1920
s=S(t/2.5)*10
x.translate(w/2,w/4)
for(i=0;i<250;i++)x.fillStyle=R(i,0,i),x.fillRect(i%25*s+i,i%10*s+i,2,i/5),x.rotate(t/40)

Dec 28 2017 10:36 PM UTC

}// 139/140

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This is probably the end of this idea. Thanks to the folks on discord for kickstarting some ideas, especially Xen!

u/Xen

no worries, keep playing with the code ;-)

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ADESONOM

function u(t) {

x.globalCompositeOperation=t%15<13?"screen":"multiply";for(i=20;i--;x.fillStyle=R(0,c=(t*10)%3,c))x.fillRect(i*100+S(t+i)*300,0,50,1e3)

Dec 28 2017 10:36 PM UTC

}// 136/140

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Curtains, probably.

u/E-Mouse

Yeah, probably.
u/joeytwiddle

Yeah my curtains are always doing that!

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retera

function u(t) {

x.fillStyle=R(t*8,255-t*8,255-t*20);
for(j=0;j<t;j++)t%20<10?x.fillRect(Math.random()*1920,j*50,8,8):x.fillRect(j*50,Math.random()*1080,8,8)

Dec 28 2017 10:33 PM UTC

}// 140/140

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eskimofo

function u(t) {

c.width|=0;g=()=>Math.random()
for(i=0;i<15000;i++)
x.fillRect(g()*1920,g()*1080,10,10)

Dec 28 2017 10:27 PM UTC

}// 87/140

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u/iverjo

No signal (Error Code: DEADBEEF). This could be due to a bad connection or bad weather conditions at your end or 1. Check the cable connections and remove any obstruction around the dish. 2. Try to change channels. 3. Have you tried turning it off and on again?

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jonathan_b

remix of d/4472 by u/jonathan_b

function u(t) {

c.width|=s=510;q=2;for(i=0;i<s*q*2;)for(j=1;j<q;)x.fillStyle=R(s/C(i++),i/9,j*q,.6),x.fillRect(960+s*C(i)*C(t/s/q%j++/j*i),s+s*S(i),20,20)

Dec 28 2017 10:26 PM UTC

}// 138/140

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let it run a bit :)

u/sigveseb

Good colors

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veubeke

function u(t) {

t?c.width^=0:(b=7,c.onclick=onmousemove=e=>e.y/c.offsetWidth*24-b%15|0?0:b+=5)
x.font='6em"'
x.fillText('U Can’t Touch This',550,b%15*80+40)

Dec 28 2017 10:20 PM UTC

}// 140/140

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u/lionleaf

hahaha . (try touching it)
u/sigveseb

Lololol
u/xem

Dunn dun dun dun ~
u/E-Mouse

Says 142/140 characters, CHEATER!
u/Purpzie

you monster

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eskimofo

function u(t) {

if(t<5.5)for(i=-100;i<=100;i++){x.beginPath()
m=300*i+T(t/4)*200
x.moveTo(m,0)
x.quadraticCurveTo(300*i+S(t)*400,560,m,1080)
x.stroke()}

Dec 28 2017 10:14 PM UTC

}// 136/140

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Sir_Magic

function u(t) {

c.width=1920;for(p=0;p<7;p++)for(i=0;i<20;i++)for(z=0;z<2;z++)x.fillRect(960+i*50*C(t)*(C(z*9)), 540+p*S(t)*i*9, 20*S(t), 120*S(t));
/*1st*/

Dec 28 2017 10:07 PM UTC

}// 140/140

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pepf

function u(t) {

c.width=2e3
e=500
x.translate(960,e)
for(y=0;y<3e3;y++){r=y%(e+t*9)
x.fillStyle=R(60*(y%5),r,10*(y%25),1)
x.fillRect(S(y)*r,C(y)*r,15,15)}

Dec 28 2017 10:04 PM UTC

}// 138/140

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mattdzugan

function u(t) {

Z=4e3;
for(i=0;i<Z;i++){
y=i/Z;n=t/2+y;D=255*(1-y);s=6+i/200;
x.fillStyle=R(y,D,100,y);x.fillRect(960+400*C(20*n),540+400*C(25*n+.4),s,s);
}

Dec 28 2017 9:59 PM UTC

}// 140/140

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u/ximavus

Woah!