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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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rrlyrae

function u(t) {

T=t/10;c.width=1920;r=900;X="0".repeat(999).split``.map(y=>Math.random()**3);X.map(y=>{j=T*T/y/y;x.fillRect(r*y*S(j)+r,r*y*C(j)+r/2,5,5)})

Feb 18 2019 7:14 PM UTC

}// 138/140

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rrlyrae: Flat rotation curve

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rrlyrae

function u(t) {

T=t/10;c.width=1920;r=900;X="0".repeat(999).split``.map(y=>Math.random()**3);X.map(y=>{j=T*T/y**3;x.fillRect(r*y*S(j)+r,r*y*C(j)+r/2,5,5)})

Feb 18 2019 7:14 PM UTC

}// 139/140

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rrlyrae: Keplerian rotation

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DataMeta

remix of d/12413 by u/Xen

function u(t) {

for(i=1e3;i--;)x.fillRect(i*2,t*99,r=6*Math.random(),r)

Feb 18 2019 6:24 PM UTC

}// 55/140

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DataMeta: Starlit sky

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Xen

remix of d/12413 by u/Xen

function u(t) {

for(i=2e3;i--;)x.fillRect(i+S(C(t/3)*i),t*99,1,1)

Feb 18 2019 6:05 PM UTC

}// 49/140

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DataMeta: This one is smooth. Surely there is an even more golfed moire possible

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Xen

remix of d/12411 by u/Xen

function u(t) {

for(i=1e3;i--;)x.fillRect(i*2+T(C(t/2)*i),t*99,1,1)

Feb 18 2019 5:58 PM UTC

}// 51/140

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DataMeta

remix of d/12385 by u/DataMeta

function u(t) {

for(c.width|=i=108;i--;)x.arc(C(i&3)*480+960,S(i-t)*360+540,20,i,i);x.fill();

Feb 18 2019 5:43 PM UTC

}// 77/140

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Xen

function u(t) {

for(i=1e3;i--;x.fillStyle=R(C(i-t)*255,t,S(i+t)*255))x.fillRect(i*2+T(t*i/9),t*99,1,1)

Feb 18 2019 4:44 PM UTC

}// 86/140

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Xen: Test

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katkip

function u(t) {

eval(unescape(escape`挮睩摴桞㴰㭴籼⡲㵒㴰⤻景爨椽㤹㤻椭ⴻ⥸⹢敧楮偡瑨⠩ⱸ⹭潶敔漨㤶〬㔴〩ⱘ㵃⡲⤪㈵〬夽匨爩⨲㔰ⱸ⹬楮敔漨㤶〫堬㔴〫天ⱸ⹬楮敔漨㤶〫堫䌨利⨲㔰ⰵ㐰⭙⭓⡒⤪㈵〩ⱸ⹳瑲潫攨⤬爫㵓⡒⭴⤬别㵃⡲⵴⤻`.replace(/u(..)/g,"$1%")))

Feb 18 2019 3:30 PM UTC

}// 140/140

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katkip

function u(t) {

c.style.background='#bbf';q=t*20;x.fillStyle=R(q,q*2,q);for(i=0;i<213;i++)x.fillRect(i*9,+C(Math.random())*250+t*99,9,2e3)

Feb 18 2019 2:34 PM UTC

}// 122/140

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katkip: Grass

katkip: #landscape #nature

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katkip

remix of d/12407 by u/katkip

function u(t) {

x.globalAlpha=.02;x.fillRect(0,0,2e3,2e3);t||(X=10,Y=540);for(i=999;i--;){X+=5,Y+=C(X*Y+t)*X/99,x.clearRect(X,Y,5,X/99);if(X>1920)X=9,Y=540}

Feb 18 2019 2:28 PM UTC

}// 140/140

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