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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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katkip

remix of d/10534 by u/tomxor

function u(t) {

x.fillRect(0,0,i=2e3,i);for(t+=t*10;p=i&1,m=t/C(t/i)+p*(t/i*i+i%t),i--;)x.clearRect(960+m*S(n=i*i+t/9+t*i/8769)/C(1/t+p),540+m*C(n+p/t),5,5)

Oct 19 2018 6:10 PM UTC

}// 140/140

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#waitforit to see how does it look in a black hole!

u/tomxor

OMG it's a stargate :P

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rnbw

function u(t) {

c.width=1920;x.fillStyle='#dbf';for(j=-16;j<159;j++)for(i=0;i<36;i++)x.fillRect(-600+i*99+C(t+j/20+i/5)*(S(t*3+i)*99),8*j+C(t+i/2)*99,99,9)

Oct 19 2018 4:36 PM UTC

}// 139/140

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oh would you look at that, now i can say i've made a dweet! (the performance isn't very good from what i've experienced, but the visual turned out well, so make of it what you will)

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yonatan

function u(t) {

w=c.width=64
h=40
for(i=5e3;i--;)i>6?x.fillRect(i&63,(i>>6)+h,s=S(i**4),s):x.drawImage(c,0,h+t%h,h,w,0,0,z=2**i*64,z,x.globalAlpha=i**.5/9)

Oct 19 2018 5:23 AM UTC

}// 139/140

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Value #noise with #fbm

u/yonatan

some cross-browser issues. better on chrome.
u/iverjo

#clouds
u/aleamb

wow! superb and very smart!

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Finianb1

remix of d/10549 by u/Finianb1

function u(t) {

for(c.width|=i=80;i--;x.fillRect(i*33+C(4*t+i%4)*9,50*S(i/4-t)+i%3*500,50,200))x.fillStyle=`hsl(${i+t*99},99%,50%)`

Oct 19 2018 2:21 AM UTC

}// 115/140

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-25 thanks to Pavel

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heyitsguay

remix of d/10397 by u/heyitsguay

function u(t) {

x.filter='blur(6px)hue-rotate(1deg'
x.drawImage(c,0,0)
x.fillStyle='#db1'
for(i=8;i--;)x.fillRect(960+C(t+i)*960,250+S(t/i)**5*620,39,39)

Oct 18 2018 10:37 PM UTC

}// 137/140

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Finianb1

function u(t) {

c.width|=0
for(i=0;i<20*4;i++){x.fillStyle=`hsl(${i+t*100},100%,50%)`
x.fillRect((i/3)*100+C(4*t+i%4)*10,50*S((i/4)-t)+(500*(i%3)),50,200)}

Oct 18 2018 6:51 PM UTC

}// 139/140

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One character under

u/pavel

-25 with a bunch of tricks for(c.width|=i=80;i--;x.fillRect(i*33+C(4*t+i%4)*9,50*S(i/4-t)+i%3*500,50,200))x.fillStyle=hsl(${i+t*99},99%,50%)
u/Finianb1

Oh, thanks!

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magna

remix of d/7191 by u/magna

function u(t) {

s=[]
for(p in x)s.push(p)
T.valueOf=Math.random
f=x[s[T*s.length|0]]
try{f.call&&f.apply(x,[T,T,T,T,T,T,T,T,T].slice(0,f.length))}catch(e){}

Oct 18 2018 6:21 PM UTC

}// 140/140

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Brute-force dweet

u/magna

Open in new tab and refresh to see random stuff
u/tomxor

I love the concept :D, it's a shame the results are so small. Maybe worth randomising the scale of some params beyond 1 also?

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ern0

remix of d/5117 by u/BackendForth

function u(t) {

c.width=320
for(i=0;i<49;i++){
a=C(t+i)*i*2
b=S(t+i)*i*1
x.fillRect(160+a,70+b,b/8,40)
}

Oct 18 2018 3:51 PM UTC

}// 88/140

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Simplified, preparing for native version

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ern0

function u(t) {

c.width=1920;for(u=0;u<100;u+=66.12){for(p=0;p<1080;p+=11){w=S(p%u+t%u)*800;x.fillStyle=R(u*4,p/4,0);x.fillRect(960-w,p,w*2,12);}}

Oct 18 2018 2:05 PM UTC

}// 133/140

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playing with sin

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katkip

function u(t) {

c.width*=1;for(i=0;i++<41;)for(j=0;j++<75;)if(i%11&&j%11)x.fillStyle=`hsl(${C(i|j)<S(i&j)?200:170} 99%50%)`,x.fillRect(j*25,i*25,25,25)

Oct 18 2018 1:23 PM UTC

}// 135/140

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Visualizing a symmetry formula