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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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karacasoft

function u(t) {

if(t==0)x.translate(c.width/2,c.height/2)
x.rotate(0.0513)
a=S(t/3)*255
x.fillStyle=R(a,0,0,1)
x.fillRect(500+S(t)*500,400 + S(2*t)*400,9,9)

Apr 26 2018 2:13 PM UTC

}// 140/140

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CocoMeister

remix of d/7806 by u/CocoMeister

function u(t) {

o=v=>x.fillRect(i*v/99+920,400-i*i/280,50,i*i/90)
for(c.style.background=R(),c.width=1920,i=60*t;i>50;i-=25)x.fillStyle=R(99,0,i),o(i),o(-i)

Apr 26 2018 12:55 PM UTC

}// 140/140

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Agnes

function u(t) {

for(c.width|=i=M=20+~~t,x.font="128px A";i--;x.fillText("🐷",1920*i/M,540+300*S(6.4*i/M+t)));

Apr 26 2018 11:00 AM UTC

}// 92/140

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Swine wave #swine #sine

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u/zanella

*applause*
u/Aezur

Swinewave function. Nice. :P
u/lionleaf

#emoji
u/sigveseb

Lol
u/lionleaf

Reference to typo on d/7779 🤣
u/iverjo

lol

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lcfrdvx

function u(t) {

c.width=2e3
for(i=0;i<(l=300);i++){x.fillStyle=`hsl(${t*9+i},90%,60%)`
a=6.3/l*i
x.fillRect(960+i%8*C(a+t)*99,520+i%8*S(a+t)*C(a*2)*30,9,9)}

Apr 26 2018 7:52 AM UTC

}// 140/140

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CocoMeister

remix of d/7800 by u/CocoMeister

function u(t) {

o=v=>x.fillRect(i*v/99+920,-i*i/280+400,9,i*i/90)
for(c.style.background=R(),c.width=1920,i=60*t;i>50;i-=20)x.fillStyle=R(99,0,i),o(i),o(-i)

Apr 26 2018 6:36 AM UTC

}// 140/140

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BuRRak

function u(t) {

for(i=c.width=99;i--;)for(j=56;j--;)x.fillRect(i,j,Math.random(),1)

Apr 26 2018 5:26 AM UTC

}// 67/140

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u/New_Core

#noise
u/rep_movsd

The TV people

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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

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zgrep

function u(t) {

r=Math.random,A=!t?[[960,1100,4.7]]:r()<.001**t?[...A,...A]:A.map(p=>[X=p[0]+9*C(a=p[2]),Y=p[1]+9*S(a),a+r(x.fillRect(X,Y,9,9))-.5])

Apr 25 2018 9:32 PM UTC

}// 132/140

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A growing tree.

u/zgrep

Viciously golfed thanks to u/FireFly and their JS golfing prowess.
u/trancor

I just facepalmed... !t is so much cheaper than t==0 (I've been using...).Well done on the mapped expansion, interesting way to generate a ton of objects.

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CocoMeister

function u(t) {

o=(v)=>x.fillRect(i*v/90+920,-i+400,20,i*2)
for(x.fillStyle=R(),x.fillRect(0,0,1920,1080),i=50*t;i>50;i-=20)x.fillStyle=R(99,0,i),o(i),o(-i)

Apr 25 2018 7:12 PM UTC

}// 140/140

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#retrowave

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BuRRak

remix of d/7797 by u/BuRRak

function u(t) {

for(i=c.width=99;i--;)for(j=56;j--;)x.fillRect(i,j,S(i&j+t*60)*0.5+0.5,1)

Apr 25 2018 4:10 PM UTC

}// 73/140

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I really like how changing a few things results in something totally different