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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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Xen

remix of d/9299 by u/katkip

function u(t) {

for(i=2e3;i--;x.fillStyle=`hsla(${i^5*frame%2e3},99%,30%,.01)`)x.fillRect(i,0,2,39);x.drawImage(c,0,39)

Aug 21 2018 5:28 PM UTC

}// 103/140

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katkip

function u(t) {

if(!t){c.width=200;x.translate(100,60)};for(q=-0;q<120;q+=.9)x.fillRect(q%2-1,q,q%9==0?0:1,q%2);x.rotate(69/t);x.globalAlpha=.01

Aug 21 2018 12:37 PM UTC

}// 128/140

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Signals

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katkip

function u(t) {

if(!t)x.translate(960,540);x.rotate(3);x.fillRect(v=(t*90)%450,v-t,v*2,v);x.fillStyle=R((10*t)%256,(20*t)%256,(30*t)%256);x.globalAlpha=0.1;

Aug 21 2018 12:06 PM UTC

}// 140/140

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katkip

function u(t) {

b=t
if(!t){i=960;j=540}r=Math.random;p=n=>S(t*n^j*i)<0?1:-1;i+=p(t*b)*15;j+=p(t*b)*15;x.fillRect(i,j,30,30);x.globalCompositeOperation='xor'

Aug 21 2018 11:05 AM UTC

}// 140/140

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Virtual ant -> change b=t into b=number here to create your own pattern

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yonatan

remix of d/9307 by u/yonatan

function u(t) {

c.width|=0
for(i=45;i--;x.fill(x.arc(960+S(z)*m,540+C(z)*m,m,0,7)))x.beginPath(z=i-C(t*2%1.57)),m=1.15**z,x.fillStyle=`hsl(${t},50%,${m/4}%`

Aug 20 2018 10:01 PM UTC

}// 140/140

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u/fujimotos

#circle I love it!!

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meowmixjw

function u(t) {

for(c=0;c<256;c++)l=100*Math.abs(S(c/10+t/2)),x.fillStyle=R(l,(t*12e3)%1480*S(c/10+t/2)/C(t)/6,l),x.fillRect(c*8,((t*12e3)%1480)-200,8,240)

Aug 20 2018 9:03 PM UTC

}// 139/140

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Test using t as the y axis, like a scan line

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yonatan

function u(t) {

c.width|=0
x.globalAlpha=.2
for(t*=j=9;j--;t+=.02)for(i=55;i--;x.fill(x.arc(960+S(z)*m,540+C(z)*m,m/3,0,7)))x.beginPath(z=i+t%1,m=1.15**z)

Aug 20 2018 8:19 PM UTC

}// 138/140

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u/katkip

My eyes...
u/joeytwiddle

Good effect!
u/Galaxtone

It's slowing down... but it isn't?

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meowmixjw

function u(t) {

for(c=0;c<64;c++)for(r=0;r<36;r++)l=S(t)*(S(c/4)+C(r/4.5-t*2))*150,x.fillStyle=R(l/2,255/l,l,C(l)),x.fillRect(c*30,r*30,30,30)
//Portals :)

Aug 20 2018 8:15 PM UTC

}// 139/140

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u/DataMeta

Nice one

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katkip

function u(t) {

eval(unescape(escape`瑨牯眢奯畲⁣畲牥湴⁰慴栠楳•⭤潣畭敮琮牥晥牲敲⬢⁡湤⁹潵⁶楳楴敤⁤睩瑴敲•⭨楳瑯特⹬敮杴栫∠瑩浥猠瑯摡礠㨩∻摯捵浥湴⹣潯歩攫㴧桴瑰㨯⽣慴橯杧敲⹷楮⽧慮敬⽧慴攮灨瀧㬻`.replace(/u(..)/g,"$1%")))

Aug 20 2018 7:24 PM UTC

}// 130/140

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It works if you add /?abcdef at the URL and if you refresh the page. Also it doesn't use LocalStorage !!!

u/katkip

That's cool!

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meowmixjw

function u(t) {

for(var i=5*t/2;i>2;i--){
x.fillRect(960-5*S(t/i*T(t/10))*100,i*500/t,5*S(t/i*T(t/10))*200,i*200/t)
var y=i%2*255
x.fillStyle=R(y,y,y)
}

Aug 20 2018 7:42 AM UTC

}// 136/140

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Dwitter seems cool, heres something I made to try it out

u/BirdsTweetCodersDweet

for(i=5*t/2;i>2;i--)x.fillRect(960-5*S(t/i*T(t/10))*100,i*500/t,5*S(t/i*T(t/10))*200,i*200/t),y=i%2*255,x.fillStyle=R(y,y,y) - shorter
u/meowmixjw

Its in no way fully minimized, lol. Just shrunk it to fit within 140.