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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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E-Mouse

remix of d/3194 by u/lurifax

function u(t) {

for(i=2e3;i--;x.fillStyle=R(C(t)*128+128,0,C(i)*128+128,.07))x.fillRect(960+T(p=i/314)*(d=250+S(p*3+t)*(S(t)*99)*C(t)*4),540+C(p)*d,9,9)

May 28 2018 5:54 PM UTC

}// 136/140

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andy

function u(t) {

for(c.width|=d=e=0,f=1e3;f--;h=d,d=e-(!!d|d>>31)*Math.abs(C(z=t/9)*d-S(z))**.5,e=C(z)+4-h,x.fillRect(d*50+800,e*50+400,t&3?5:50,t&1?3:50));

Mar 30 2019 10:29 PM UTC

}// 139/140

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u/magna

#glitch

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jayIves

function u(t) {

c.width=1920; 
  for(i=0;i<256;i++){
  x.fillRect(i*8, 400+100*(C(6*i+5*t)+C(5*i+7*t)),6, 150)
}

Dec 27 2017 12:46 AM UTC

}// 96/140

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taupelink

remix of d/20808 by u/taupelink

function u(t) {

f=a=>T(X%a%Y*Y)*k;for(r=Math.random,i=k=256;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*5)*9,x.fillStyle=R(f(h=T(Y*9)*T(X*9)),f(h+.1),f(h+.2))

Nov 29 2020 7:23 AM UTC

}// 140/140

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d/20840

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anotherkitten

function u(t) {

x.fill(p = new Path2D(),p.arc(960,540,270,0,8))

Sep 16 2020 3:02 PM UTC

}// 47/140

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Comment with something for me to add to this, will remix with one suggestion per iteration (until its too complex to continue)

u/danny@hille.dk

a tail
u/anotherkitten

tail added! d/19979

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DazeWare

remix of d/25962 by u/DazeWare

function u(t) {

c.width=1920
for(i=0;i<1080;i++){
c.style.filter="blur(2vh)contrast(5)"
x.fillRect(1920*T(i*S(t*.0005+i)),i,50,50)}

Aug 26 2022 8:20 PM UTC

}// 116/140

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#liquid #metaballs

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FireFly

function u(t) {

x.strokeStyle='hsl('+t*8+',90%,50%)'
x.beginPath()
for(i=24;i;x[i-24?'lineTo':'moveTo'](960+--i*20*C(U=i/4+t/4),540+i*20*S(U)));
x.stroke()

Feb 28 2017 4:37 PM UTC

}// 139/140

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u/donbright

cool hsl

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firegodjr

remix of d/9059 by u/firegodjr

function u(t) {

for(j=100;j--;)for(y=100;y--;)x.fillStyle=R(b=(t*99+(S(t)*(j-51)+C(t)*(y-50)^S(t)*(y-51)-C(t)*(j-50)))%99*2,b,b),x.fillRect(j*9+510,y*9,9,9)

Aug 2 2018 1:48 PM UTC

}// 140/140

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u/Xen

Love It!
u/aleamb

great!

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New_Core

function u(t) {

with(x)for(fillRect(0,0,w=2e3,w),a=i=540;i--;strokeRect(0,a-(i%2<1?-i:i),w,w))setLineDash([i]),lineDashOffset=(-w/2-i*t)%i,strokeStyle=R(i)

Jun 1 2023 10:56 PM UTC

}// 139/140

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based on one of my older once...

u/danny@hille.dk

NICE!

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danny@hille.dk

function u(t) {

eval(unescape(escape`景爨呗㵉㴾匨琪㌫爫䤪ㄮ㘩⨶〬挮睩摴栽礽㜰〻搽呗⡲㵹⼲㔵⤬礭㴲㬩景爨椽㐻渽呗⡩⤬洽呗⡩⬱⤬戽㈵㔪⡭⵮⤯㜰ⱸ⹦楬汓瑹汥㵒⡩┲㼰㩢ⰰⱩ┲☦戩Ⱪⴭ㬩渼洦♸⹦楬汒散琨渫搫㌵〬礬洭測㈩`.replace(/u(..)/g,"$1%")))

Sep 29 2020 2:59 PM UTC

}// 134/140

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Nothing new, it has all been done before. I just had to try again :-) #twister for(TW=I=>S(t*3+r+I*1.6)*60,c.width=y=700;d=TW(r=y/255),y-=2;)for(i=4;n=TW(i),m=TW(i+1),b=255*(m-n)/70,x.fillStyle=R(i%2?0:b,0,i%2&&b),i--;)n<m&&x.fillRect(n+d+350,y,m-n,2)