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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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KilledByAPixel

remix of d/26186 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`󥌽󧼽󟭴󟝓󚌨󭌫󞌩󚬪󞜩󒭆󟜨󦌬󦜬󦬬󠜩󟜾󦬾󜜦󙭔󚍸󦽦󟜧󩭩󫍬󤭥󨽴󙽝󚍘󛍙󛍚󛍚󚜬󡬨󦌭󤼨󠜩󚭚󛼲󛍙󛝃󚍁󚜪󦬯󜬬󦬪󛬹󝼬󠜫󥌨󚜯󝌩󚜾󛬸󙬦󡬨󦌬󦜬󦬪󛬶󛍔󚌩󛼮󝼩󒭴󟽃󟝴󚬸󩜳󞭆󚌷󜌰󛌱󩜳󛌸󜌬󜌩󒭦󫽲󚍩󟜲󩜳󞽩󛜭󞽸󦽦󧜨󪜬󠼫󟝔󚌩󚬳󛌮󜬬󜭥󜼩󚜻`.replace(/u../g,'')))

Sep 25 2022 4:08 PM UTC

}// 139/140

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Tree + Mountains 🌳⛰️

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PhiLho

remix of d/246 by u/PhiLho

function u(t) {

M=255;s=5;for(h=0;h<1920;h+=s)for(v=0;v<1080;v+=s){b=M*C(h/1222);g=M*S(v/687);r=M*(1+S(t*7))/2;x.fillStyle=R(r,g,b);x.fillRect(h,v,s,s)}

Jul 20 2016 1:29 PM UTC

}// 136/140

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Show more comments…
u/iverjo

Nice colors, but low frame rate
u/iverjo

Try lowering the resolution
u/PhiLho

Thanks, but I wanted it slow... :-) Change s value to higher value for faster rendering.
u/iverjo

To make it more clear: I like the slow pace, but not the performance hog ;)
u/iverjo

Here's a less performance-intensive version: c.width=96;M=255;for(h=96;h--;)for(v=54;v--;x.fillStyle=R(M*(1+S(t))/2,M*S(v/34.4),M*C(h/61.1)),x.fillRect(h,v,1,1))
u/iverjo

It should still be smooth and slow-paced
u/iverjo

The previous code might not work.. here's an alternative version that probably works: c.width=96;M=255;for(h=96;h--;)for(v=54;v--;){x.fillStyle=R(M*(1+S(t))/2,M*S(v/34.4),M*C(h/61.1)),x.fillRect(h,v,1,1)}

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lcfrdvx

function u(t) {

c.width=2e3
for(i=0;i<(l=300);i++){x.fillStyle=`hsl(${t*9+i},90%,60%)`
a=6.3/l*i
x.fillRect(960+i%8*C(a+t)*99,520+i%8*S(a+t)*C(a*2)*30,9,9)}

Apr 26 2018 7:52 AM UTC

}// 140/140

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metamero

remix of d/11327 by u/metamero

function u(t) {

onmousemove=e=>b?x.lineTo(e.x,e.y):0
onmousedown=e=>b=1
onmouseup=e=>x.beginPath(b=0)
t?x.stroke():(onresize=e=>c.width=innerWidth)()

Dec 6 2018 6:15 PM UTC

}// 133/140

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minimalist marker #interactive #paint v1.1

u/katkip

Cool!
u/iverjo

It even works in fullscreen!
u/metamero

Yes! Look at remix chain, there are other versions, including mobile.

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AOctavio

remix of d/18818 by u/AOctavio

function u(t) {

c.width=1920
x.fillStyle=R(S(t)*255,S(t*2.0944)*255,S(t*4.18879)*255)
for(i=0;i<100;i++)
x.fillRect(-19+i*40,500,19,500*S(t+i*6.2))

May 16 2020 12:18 PM UTC

}// 131/140

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veubeke

function u(t) {

c.width^=0
for(Y=11;Y--;)for(X=Y+1;X--;x.fill(new Path2D(`M${_=960+(X*52-Y*26)*s},${$=Y*46*s+540-s*250}L${_-26},${$+45}H${_+26}`)))s=1-S(t)

Oct 11 2018 2:57 PM UTC

}// 139/140

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JonasPeeters

function u(t) {

c.width=150
d=new Date
b=5
f(d.getSeconds())
f(d.getMinutes())
function f(a){for(i=0;i<60;i++){x.fillText(a==i?i:" "+i,b*16,50-(i-a)*9)}b--}

Jan 2 2018 1:45 AM UTC

}// 140/140

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Xen

remix of d/12111 by u/katkip

function u(t) {

for(c.width=i=300,x.translate(150,89);i--;x.rotate(S(t/9)))x.strokeRect(-i,-i,i*2,i*2)

Feb 3 2019 8:26 PM UTC

}// 86/140

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FireFly

remix of d/3005 by u/FireFly

function u(t) {

for(i=5e3;Z=(i--%4>1)+i/128;i%4||x.beginPath(x.fill()))X=i%128+2>>2,x.fillStyle=R(Y=S(X*X/32+Z*Z/32-X-Z-t*6)*80+99),x.lineTo(X*60,Z*35-Y)

Aug 3 2017 9:03 PM UTC

}// 137/140

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Ripples! With proper quads instead. Add +Z*X-Z*16 after X*60 for perspective projection too (brings it up to 146)

u/FireFly

Another byte can be saved with with(x), but this causes a fair bit of slowdown for me. Thanks for some golfing tips from qfox and others on the jsgolf slack :)
u/cantelope

can't stop watching. def in my top 10 favs
u/iverjo

Very impressive!

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sdavey

remix of d/12587 by u/sdavey

function u(t) {

for(c.width|=X=0,x.setTransform(30,1,1,48,960,540);X<8;x.fill(new Path2D(`M5 4 1 1 t 12-2-l${C(t)*X^t}`)))x.rotate(X++?.3*t:X)

Mar 1 2019 11:03 PM UTC

}// 127/140

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u/katkip

I saw a nazi sign shuriken