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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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camel_case

function u(t) {

l={}
p=0.01
r+=0.007
for(i=0; i<50; i++){
p+=r*p*(1-p)
l[i%h]=p
for(j=0; j<h; j++){x.fillRect(t*120, 1080-l[j]*540, 2, 2)}
}
}
var r=0,h=6
{

Mar 14 2019 5:50 PM UTC

}// 140/140

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Logistics map with some bifurcation, still trying to figure out how to make it look pretty tho

u/artfarnaa

Nice, though I suggest provide a link to background info on what a logistics map is and what bifurcation does. We newbies need just a tad of hand holding.
u/rodrigo.siqueira

#bifurcation

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Xen

remix of d/12742 by u/AdamLantz

function u(t) {

for(i=I=95;i--;x.fillRect(935+S(t-i/.3)*1e3,540+C(t+i/.7)*1e3,I,I))x.fillStyle=R(i*I%255,i*5,C(i+t)*255,.03)

Mar 14 2019 5:38 PM UTC

}// 108/140

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had to remix :)

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AdamLantz

function u(t) {

c.width=1920;I=44;W=515
for(i=0;i<I;i++){
x.fillStyle=R(Y=i*I%255,Y,Y)
x.fillRect(935+S(t-0.1*i)*215, W+C(t-0.01*i)*W, 50, 50)
}

Mar 14 2019 5:15 PM UTC

}// 128/140

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It's a... snake?

u/Xen

Nice

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hermanya

function u(t) {

if (!window.helloWorlded) {
  console.info('hello world')
  window.helloWorlded = true;
}

Mar 14 2019 3:19 PM UTC

}// 90/140

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u/Xen

ey up

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DeathBoy

function u(t) {

c.width=1920
n=19
for(i=0;i<n;i++)
{
Y=C(t*3+(i+n)%n)
x.fillStyle=R(Y*250)
x.fillRect(0+i*100,550+S(t*3+i)*300,100,Y*120)
}

Mar 14 2019 11:56 AM UTC

}// 123/140

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u/Undefined

c.width|=0;for(i=n=19;i--;)Y=C(t*3+(i+n)%n),x.fillStyle=R(Y*250),x.fillRect(0+i*99,540+S(t*3+i)*300,99,Y*120) - Golf your code, 110
u/Undefined

108 if you remove the unnecessary 0+
u/Xen

for(c.width|=i=n=98;i--;x.fillRect(i*n,540+S(t*3+i)*300,n,Y*n))x.fillStyle=R((Y=C(t*3+i+n%n))*250) 98bytes with tiny tweak

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LimeLaser

function u(t) {

c.width|=0
r=Math.random
p=t?p.map(([i,j,u,v]=[2e3*r(),2e3*r(),2*r(),4*r()])=>[(i+u)%2e3,(j+v)%2e3,u,v,x.fillRect(i,j,8,8)]):[...Array(4e3)]

Mar 14 2019 5:42 AM UTC

}// 140/140

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Infinite Snowfall (Which Goes Right Because Modulo)

u/Jezza

Squeezed in some snow that floats left. ❄️❄️❄️ https://www.dwitter.net/d/12751

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DataMeta

function u(t) {

c=400;for(i=512;i--;)x.fillStyle=R(o=i/2,o,o,.55),
x.fillRect(960+c*S(t+i/22*7.111),540+c*C(t-i),8,8)

Mar 14 2019 3:05 AM UTC

}// 101/140

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u/Xen

love it!
u/UEZ

#Lissajous

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Jezza

function u(t) {

t||(X=Y=0);x.globalAlpha=.1;for(i=500;i--;)X+=S(Y),Y+=C(X),x.fillRect(X*60,Y*60,1,1);X=++X%33;Y=++Y%19

Mar 14 2019 2:55 AM UTC

}// 102/140

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X+=S(Y);Y+=C(X)

u/Xen

#waitforit
u/DataMeta

I really dig this

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katkip

function u(t) {

for(i=999;i--;)r=Math.random()*t*3,x.fillRect(
959+S(r/3+S(r/9+S(r+t)/399)*r*2)*960,
539+S(r/2+C(r/5-C(r+t)/399)*r*2)*540,
2,2);

Mar 13 2019 12:34 PM UTC

}// 128/140

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#waitforit #abstract ink can't escape

u/Ath0r

cool!

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marc8

function u(t) {

c.width=w=320
for(i=0;i<w;i++){
z=1-(S(k=(i-w/2)/11)/k)**2
x.globalAlpha=z**10 //gamma
x.lineTo(i,1+z*60)
x.fillRect(i,80,1,70)}
x.stroke()

Mar 12 2019 9:59 PM UTC

}// 139/140

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The physics dweets: single slit diffraction figure. Adjust the gamma value from 1 (accurate) to whatever (enhanced).

u/rodrigo.siqueira

Morlet Wavelet + Gabor filter #wavelet