Dweets awesomed by u/Tekmap

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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retera

remix of d/4328 by u/retera

function u(t) {

c.width|=0;
for(r=0;r++<10;){s=480+C(r)*r*5;for(q=0;q++<8;){for(j=0;j++<9;){a=q/t+t/r;x.fillRect(C(a)*s*S(j+t)+960,S(a)*s*C(j-t)+540,8,8)}}}

Dec 28 2017 8:00 AM UTC

}// 140/140

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u/Purpzie

119 characters: for(c.width|=0,d=720;d--;x.fillRect(C(a=b/8/t+t/r)*s*S(b%8+t)+960,S(a)*s*C(b%8-t)+540,8,8))s=480+C(r=0|d/72,b=d%72)*r*5

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@.+

function u(t) {

c.width^=0;
for(i=0;i<2000;i+=10){
for(j=0;j<1200;j+=10){
g=(a,c)=>S(Math.hypot(a-j,a-i)/100-5*t)*5;
m=g(200)+g(600);
x.fillRect(i,j,m,m);}}

Dec 28 2017 12:35 AM UTC

}// 140/140

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u/Xen

pretty sexy...
u/joeytwiddle

Looks good
u/joeytwiddle

#plasma #dither
u/magna

Cool!

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phoenixssbm

function u(t) {

c.width=1920;for(i=-20;i<21;i++)x.fillRect(910+42*i*(1/C(t)),540+(100*S(t*i)),i,i*100)

Dec 27 2017 10:32 PM UTC

}// 86/140

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coltonb

function u(t) {

for(i=1;i<90;i++){
b=i+t*2;
s=25;
x.fillStyle='hsl('+b*30+',100%,50%)';
x.fillRect(i*s,C(b)*500+500,s,s);
}

Dec 27 2017 9:58 PM UTC

}// 108/140

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Buckyballsack

function u(t) {

k=300;for(i=30;i--;)x.fillStyle=`hsl(${(t*80+i*10)},100%,50%)`,x.beginPath(),x.arc(k*S(t*3-i*.15)+960,k*S(t*.5-i*.05)+540,i*50,0,7),x.fill()

Dec 27 2017 2:57 AM UTC

}// 140/140

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u/joeytwiddle

#rainbow #tunnel

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Exquisite

function u(t) {

r=1080;d=960;c.width=2*d;for(i=0;i<999;i++){x.fillStyle=R(i%800,i%255,i%300);x.fillRect(d+300*C(i+t),r/2+300*S(i)+T(t+i),10,10);}

Dec 27 2017 2:29 AM UTC

}// 129/140

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u/Polyducks

This is an absolute trip.
u/Exquisite

Haha thanks, Tan functions do some wacky stuff

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sadropol

function u(t) {

c.width|=0;for(i=1;i<140;i++){b=2*t+i;o=(S(b+5)*226)%256;x.fillStyle=R(o,o,o,1);x.fillRect(940+S(b)*200,6*i+(1.3*i)*399%400,8,8);}

Dec 26 2017 11:40 PM UTC

}// 130/140

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u/sigveseb

nice helix!
u/vain

very nice

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GoogleBen

function u(t) {

c.width=1920;
  for(i=-10;i<10;i++) 
  x.fillRect(960+i*30, 400 + T(t+(i*3))*100, 27, 200)

Dec 26 2017 11:18 PM UTC

}// 90/140

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New_Core

remix of d/3677 by u/magna

function u(t) {

i=t*60*T
for(T=j=385;j--;x.fillStyle=R(X,(X+1&30|Y+4&24&&Y+1&30|X+4&24?(X^Y)&32?4:5:X+Y+6&32?3:7)/9*T))x.fillRect((X=j%T)*5,(Y=i/T|0)*5,5,5)

Dec 21 2017 10:24 AM UTC

}// 140/140

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just wanted to enjoy it in 60 FPS..

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magna

remix of d/3676 by u/magna

function u(t) {

w=c.width=384;for(i=w*w;i--;x.fillRect(X,Y,1,1))X=i%w,Y=i/w|0,x.fillStyle=R(X,(X+1&30|Y+4&24&&Y+1&30|X+4&24?(X^Y)&32?4:5:X+Y+6&32?3:7)/9*w)

Dec 21 2017 2:49 AM UTC

}// 139/140

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u/iverjo

#opticalillusion

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