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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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BirdsTweetCodersDweet

function u(t) {

for(i=2;i--;)x.beginPath(x.fillStyle=R(i?a=S(t)*129+129:0,0,i?0:a))|x.arc(960+80*S(i?π=t*5:n),540+80*C(i?n=π+3:π),80-30*S(t*8),0,7)|x.fill()

Jun 10 2018 4:28 PM UTC

}// 140/140

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Spinning orbs

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u/BirdsTweetCodersDweet

Longer, but better (153): for(i=2;i--;)x.beginPath(x.fillStyle=R(i?w=255-(s=C(t*2)*127+128):s,0,i?s:w))|x.arc(960+80*S(i?π=t*5:n),540+80*C(i?n=π+3.14:π),80-30*S(t*8),0,7)|x.fill()
u/BirdsTweetCodersDweet

Inspired by the "second phase" in http://slicker.me/javascript/yinyang.htm. Thank you to Joey, Veubeke, and Athos from Discord for the last ~100 chars golf (I still golfed it from 480 chars to 240 though :P)
u/BirdsTweetCodersDweet

Putting a=S(t*2) also makes the color transition better, but that would be 142 chars
u/pythech

just golfed the a=S(t*2) version
u/pythech

golfed the 153 chars version too
u/pythech

I don't feel comfortable owning your work just because I could golf it though. I just put them as remixes but I can delete them if you want and you can repost it I guess (I don't use discord, bummer, maybe I should?).
u/joeytwiddle

I also feel uncomfortable owning your Debian logo. But that's how things go on Dwitter these days! u/lionleaf was talking about a remix-in-comments feature. Perhaps this is part of the motivation.
u/pythech

Cool idea! Yours was a proper remix though IMO, which involved changing the code and so on. Also great job on that btw :D
u/BirdsTweetCodersDweet

No problem pythech, just post the links here, and give credit :P
u/BirdsTweetCodersDweet

And yeah, join discord

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New_Core

function u(t) {

c.width=-1
for(i=99;i--;)x.fillText(String.fromCodePoint(65+i%58),i*8-t*60%464,177),x.drawImage(c,i+260,170,1,10,i*8,50+20*S(i/9+t),18,60)

Jun 10 2018 12:45 PM UTC

}// 138/140

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Xen

remix of d/8432 by u/firegodjr

function u(t) {

for(c.width|=i=f=750;i--;)x.fillRect(S((i-t*299)/79)*f*S((i+99*C(t))/12)+f,i*5,9*i,4+C(t))

Jun 5 2018 6:00 PM UTC

}// 90/140

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u/joeytwiddle

Is this #water or #fire ?
u/firegodjr

yes
u/PiggyClone205

This ^
u/katkip

it is #road

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joeytwiddle

remix of d/8393 by u/firegodjr

function u(t) {

for(c.width|=0,i=4e3;i--;x.beginPath())x.globalAlpha=.03,x.arc(S(t*6+i*i/99)*i*i/1e4+960,C(t*6+i/99)*i*i/1e4+540,i/30+2,0,7),x.fill()

Jun 5 2018 9:45 AM UTC

}// 133/140

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Soft spiral happy accident 1

u/hollo47

I'm experiencing some Rorschach thing, that's a dog's face!
u/joeytwiddle

It's curious how a small bug in the spiral code seems to have produced some straight lines

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hope4tg

remix of d/8253 by u/hope4tg

function u(t) {

x.font='3em x';for(i=240;i--;x.fillText('■',i*8,(t*5|0)*8))x.fillStyle=R(l=(S(i/10)*(t*S(t)-t*t)%5/5)*255,(l+128+(t*4))%255,0)

May 29 2018 9:36 AM UTC

}// 126/140

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Alien art

u/hope4tg

#weird
u/S.T.L.K.R.

Alien embrio generator

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hope4tg

remix of d/8217 by u/johnbruin

function u(t) {

c.width=-1
x.translate(150,85)
for(j=10;j--;){
x.rotate(t)
for(i=20;i--;)x.rotate(0.1*C(i+j)),x.fillText("----",0,j*C(S(t))*10)}

May 26 2018 6:36 PM UTC

}// 128/140

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u/rhys5584

is this loss

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Xen

remix of d/6772 by u/yaska

function u(t) {

for(c.width|=i=800,x.font="50px A";i--;)x.fillText("o0o",960+800*C((5*i-(t*T(t)%i))/8)/(i*.008),5e2+800*S((5*i-t*S(t))/4)/(i*.008))

May 18 2018 8:09 PM UTC

}// 131/140

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had to have a play ;-)

u/firegodjr

This is what a fever dream looks like

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firegodjr

remix of d/8125 by u/prplz

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=f>C(i/5)+(t-3)%6/2?'#fff':'#000'

May 18 2018 7:59 PM UTC

}// 136/140

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Geometric sin wave ^^

u/firegodjr

#triangles #sinwave #random
u/Xen

niiice
u/aleamb

cool
u/firegodjr

#charmatrix
u/firegodjr

And thanks!

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Xen

remix of d/8057 by u/nix

function u(t) {

for(c.width=i=1e3;i;i-=8)x.beginPath(s=S(i+t-C(t))),x.ellipse(500+69*s,300,h=69*(2+C(t+i)),h,s,2+s,s),x.stroke()

May 9 2018 8:40 PM UTC

}// 112/140

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Had to have a play with this one ;-)

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jdidion

function u(t) {

c.width=2e2
q=3.14
for(i=0;i<=q*2;i+=q/45){x.beginPath()
x.ellipse(90+S(i)*60,52+C(i)*40,9+5*S(t+i),9+4*S(t*.5-i*3),t+i/20,0,8)
x.stroke()}

May 9 2018 12:07 PM UTC

}// 139/140

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u/BirdsTweetCodersDweet

Looks kinda like my d/6672 but with less circles and lower resolution :P