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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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taupelink

remix of d/15456 by u/taupelink

function u(t) {

for(i=d=e=f=1e3;i--;x.fillRect(d*z,z+e*z,h=1/Math.log(t+4),h))[d,e,f]=[(r=Math.random(z=240)*9|0)+f*S(d)+(.5-f)*T(d),r%3+f*C(d),(r%2/2+f)/2]

Aug 19 2019 10:51 PM UTC

}// 140/140

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d/15461

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Benjiji

function u(t) {

c.width^=0
N=999*S(t/10)
for(i=0;i<N;)Z=2*i/N-1,Y=S(i*0.2)*Z*0.3,X=C(i++*0.2)*Z+Y*C(0.7),Y=Z+Y*S(0.7),x.fillRect(X*300+960,-Y*300+540,15,5)

Aug 19 2019 9:18 PM UTC

}// 139/140

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#hourglass #runningtime

Show more comments…
u/Benjiji

Did not find a way to get it to start over more quickly in 140...
u/13thptr

Multiplying by 0.2 is equivalent to dividing by 5 (gain 2 bytes each time) and cos(0.7rad) is roughly 0.76 which can be written .76
u/13thptr

also moving c.width^=0 to the first part of the for loop saves 2 bytes
u/13thptr

123 : N=999*S(t/10) for(c.width^=i=0;i<N;)Z=2*i/N-1,Y=S(i/5)*Z*.3,X=C(i++/5)*Z+Y*.76,Y=Z+Y*.64,x.fillRect(X*300+960,-Y*300+540,15,5)
u/13thptr

*126: N=999*S(t/10);for(c.width^=i=0;i<N;)Z=2*i/N-1,Y=S(i/5)*Z*.3,X=C(i++/5)*Z+Y*.76,Y=Z+Y*.64,x.fillRect(X*300+960,-Y*300+540,15,5)
u/Benjiji

Nice, thx!
u/atgz

you can also use .7 instead of 0.7, might come in handy next time

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craig_ers

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<100;i++)
x.arc(100*t,2*t, i*t,i*5+t, 40*i);x.stroke();

Aug 19 2019 7:55 PM UTC

}// 100/140

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tomxor

remix of d/15454 by u/katkip

function u(t) {

a ++
throw a
}{a=1e3

Aug 19 2019 7:28 PM UTC

}// 20/140

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Variable initialisation with only +2 chars (hack)

u/tomxor

Saves up to 4 chars vs t||(a=1e3);
u/katkip

Ohh
u/katkip

#genius #exploit I didnt know about that. This is clever

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mildlybean

function u(t) {

for(c.width+=y=0;y++<3;)for(i=-1;i++<39;){h=(i+1)*6.5;x.fillStyle=R(h,255-h,y*50);x.fillRect((n=i*99+S(t)*999)-999,S(n/99)*99+y*250,50,200)}

Aug 19 2019 1:15 PM UTC

}// 140/140

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Here's a simple one

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taupelink

remix of d/15450 by u/taupelink

function u(t) {

for(i=d=e=f=1e3;i--;x.fillRect(99+d*z,z+e*z,h=1/Math.log(t+3),h))[d,e,f]=[(r=Math.random(z=240)*8|0)+f*C(e),r%3+f*(r%2?T(e):S(e)),(r%2+f)/2]

Aug 19 2019 12:14 PM UTC

}// 140/140

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d/15456

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mildlybean

function u(t) {

v=1,b=9,k=2,n=1.1,m=.05,l=7;for(c.width+=i=0;i++<999;){x.fillRect(960+(q=S(e=t*v+i*b)*(y=(i*k)**n)),540+(w=C(e)*y),r=(q**2+w**2)**.5*m+l,r)}

Aug 19 2019 12:12 PM UTC

}// 140/140

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Try v=-.5, b=t/100 for something way more interesting

u/Xen

nice!

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katkip

function u(t) {

}{a=()=>{~{[1]:[]}}

Aug 19 2019 10:42 AM UTC

}// 19/140

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hmmm

u/tomxor

Haha, regex cannot parse an AST... also: }{a = 1
u/tomxor

I take that back, not sure what's going on, can't see much happening in between textarea and eval in iframe.
u/tomxor

Ahh, i get it: function u(t) {} {a=1} the end part is valid if it's an object literal or ES6 destructuring.
u/tomxor

You could actually use this for intialisation variables instead of checking !t... might be smaller
u/tomxor

i.e }{a=1 rather than !t||(a=1) (saves 4 chars)

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katkip

function u(t) {

c.width*=1;for(i=99;i--;)x.beginPath(),x.ellipse(960,540+i*.8,300+S(t)*59,600-i*(1+S(t)/2),3.14/2,0,7),x.stroke()

Aug 19 2019 10:23 AM UTC

}// 113/140

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dish

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username

remix of d/15433 by u/username

function u(t) {

eval(unescape(escape`朽挮睩摴桞㴰㭦潲⡪㴴㭪ⴭ㬩景爨椽朻ⴭ椻砮晩汬剥捴⡩ⰵ㐰⵷⼲⭓⡩⼴㌩⨹⬨焽㤶〭椩⼲⨨焾㸳ㄩ⨪椬㈬眩⥷㴮㐪⨨椯㤹⴨琫権⨶┲㜫㔩⨪㈪ㄶㄫ㤬砮晩汬却祬攽恨獬⠤筩⼶紬㘸┬㔰╠`.replace(/u(..)/g,"$1%")))

Aug 19 2019 10:08 AM UTC

}// 130/140

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blobs splitting along the rainbow