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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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anthonylewis

remix of d/7659 by u/New_Core

function u(t) {

w=c.width^=0
for(i=30;i--;)
Z=w/(i-t%2+1),x.rect(-Z/2+960,-Z/2+540,Z,Z),x.stroke()

Apr 20 2018 12:16 AM UTC

}// 82/140

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A simple tunnel to use a base for future effects (hopefully)

u/jylikangas

You can use strokeRect here. Golfed to 71b... for(w=c.width|=i=30;i--;x.strokeRect(960-Z/2,540-Z/2,Z,Z))Z=w/(i-t%2+1)
u/magna

#tunnel

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hollo47

function u(t) {

c.width=1920
n=300
f=345
x.beginPath()
for(i=0;i<=n;i++){z=-4+S(t)-2*C(t+i*f)
x.lineTo(960+S(t+i*f)*i*4/-z,f+(C(i*f)*4+i*4)/-z)
x.stroke()}

Apr 19 2018 4:33 PM UTC

}// 139/140

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My first perspective! I know there's like a thousand of these on dwitter, but this is mine and I understand what's going on!

u/aleamb

Awesome! ;)
u/BuRRak

#perspective

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gasaraceno

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

Apr 19 2018 3:35 PM UTC

}// 113/140

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Agnes

function u(t) {

with(x)for(w=c.width|=i=36;i--;)for(j=M=24;j--;)fillStyle=R(0,3*i*(1+C(t/18)),255*i/36,i/36),fillRect(w*j/M,540+i/36+150*S(i+j+t),w/M,540);

Apr 19 2018 7:42 AM UTC

}// 139/140

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#sea #ocean

u/iverjo

#water

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anthonylewis

function u(t) {

c.width=1920;x.fillStyle=R(0,0,0,0.3)
for(i=64;i--;)x.beginPath(x.fill()),
x.arc(S(t+i/5)*400+960,C(t+i/50)*400+540,64,0,6.28)

Apr 19 2018 2:09 AM UTC

}// 126/140

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u/BalintCsala

c.width|=0, x.globalAlpha=.3

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Xen

function u(t) {

x.font="599px x",x.globalCompositeOperation="difference"
x.fillText('💙',5e2+C(t*9)*99,7e2+S(t*7)*99)
x.drawImage(c,C(t*9)*199,S(t*7)*199)

Apr 18 2018 7:43 PM UTC

}// 137/140

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u/joeytwiddle

Hi Xen! 256px is the largest possible font size on this Mac
u/iverjo

#hearts

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firegodjr

remix of d/7710 by u/firegodjr

function u(t) {

for(i=100;i-=.5;x.fill(),x.beginPath())x.fillStyle=`hsl(${i+t*30},99%,${110-1*i}%)`,x.arc(960-930*C(i+t),1140-12*i*S(t),40,0,7)

Apr 18 2018 7:38 PM UTC

}// 127/140

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An Otherworldly Forest

u/firegodjr

(best at 60fps!)
u/firegodjr

nah, works at all sorts of fps. Nevermind. ^^;
u/sigveseb

Love the colors!
u/iverjo

Yes, good colors

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firegodjr

function u(t) {

for(i=100;i--;x.beginPath())x.fillStyle=`hsl(${i+t*30},99%,${110-1*i}%)`,x.arc(960-200*C(i+t),500-5*i*S(i+t),20,0,2*Math.PI),x.fill()

Apr 18 2018 7:05 PM UTC

}// 133/140

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A portal to another realm? 🤔

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joeytwiddle

function u(t) {

t?0:((async()=>eval(await(await fetch('//widgets.bitcoin.com/widget.js')).text()))(),c.parentNode.innerHTML="<div class=btcwdgt-chart>")

Apr 18 2018 5:44 PM UTC

}// 136/140

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World's worst ever sine wave

u/firegodjr

Ah, so a sigh-n wave
u/firegodjr

(i'm so sorry)
u/sigveseb

Lol a new contender in Veubeke's random challenge? :D
u/joeytwiddle

hah!
u/joeytwiddle

#external

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camel_case

function u(t) {

x.fillRect(X+=C(H+=+s[j++]*Math.PI/3)*9,Y+=S(H)*9,4,4)
}for(X=Y=H=j=0,i=s="0";i<5;i++)s=s.replace(/0/g,"0104010");{

Apr 18 2018 2:51 PM UTC

}// 115/140

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First attempt at L-System

u/zanella

Fractals always get my "Awesome!". :)
u/BuRRak

#fractal