Dwitter - javascript demos in 140 characters

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.

Try the new frontend: beta.dwitter.net
Current theme challenge: #Food

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Hedgehog

remix of d/9969 by u/Hedgehog

function u(t) {

x.strokeRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:19 PM UTC

}// 59/140

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One color also not bad

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Hedgehog

remix of d/9969 by u/Hedgehog

function u(t) {

x.fillStyle = R(Math.random()*255, Math.random()*255, Math.random()*255)
x.fillRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:17 PM UTC

}// 130/140

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Hmmmm №2

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Hedgehog

function u(t) {

x.strokeStyle = R(Math.random()*255, Math.random()*255, Math.random()*255)
x.strokeRect(Math.random()*1920,Math.random()*1080,200,200)

Sep 20 2018 5:16 PM UTC

}// 134/140

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Hmmmm

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katkip

function u(t) {

c.width^=0;c.style.transform='rotate('+C(t)*10+'deg)';for(i=0;i<9;i++)x.fillRect(540+i*100+S(t+S(i)/9)*300,400,50,200)

Sep 19 2018 3:59 PM UTC

}// 118/140

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Gravity #default !! !

u/katkip

#animated
u/katkip

You will understand this when selecting green theme

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katkip

remix of d/9964 by u/katkip

function u(t) {

x.lineWidth=0.01;x.arc(960+S(t*1.9217759919284157192857918275019275876192876596565161162058752)*550,540+C(t)*550,550,2,frame/360);x.stroke()

Sep 20 2018 3:50 PM UTC

}// 140/140

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Quant1um

function u(t) {

eval(unescape(escape`景爨挮睩摴桞㵩㴰㭩㰶㈸㭩⬽㤩景爨樽ⴳ㭪㰴㭪⬫⥢㵩⼱〰ⱡ㴹⭪⩓⡭㵢⼲⭴⤬渽䌨戩⩡Ɐ㵓⡢⤪愬瀽横䌨洩Ɽ㵃⡢⤪㔫樫㄰ⱸ⹦楬汓瑹汥㵒⡤⨽㄰ⱤⱤ⤬砮晩汬剥捴⠨㌲⭮ⵯ⤪㌰Ⱘ㌲⭮⭯⭰⨲⤪ㄵⰲ〬㈰⤻`.replace(/u(..)/g,"$1%")))

Sep 16 2018 1:37 PM UTC

}// 139/140

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Simple Möbius strip

u/Quant1um

#mobius
u/prplz

-50 chars d/9910

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Noah

remix of d/9878 by u/Noah

function u(t) {

for(c.width|=i=900;i--;)x.fillRect(i*2,500+S((i+(t/10))*2e5)*(200+i/-2),10,10*(i-470))

Sep 16 2018 1:17 PM UTC

}// 86/140

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double the waves

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anotherkitten

function u(t) {

if(!t)x.translate(960,540);x.fillStyle=(t%1<.5)?"#33dddd58":"#dd33dd48"
for(k=1500;k--;e=frame/30+k**.9,x.fillRect(k*S(e),k*C(e),10,10)){}

Sep 18 2018 10:16 PM UTC

}// 138/140

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u/Xen

Love It!

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acorv

function u(t) {

eval(unescape(escape`挮睩摴栽㤹⬲㔰⨨匨琩⬱⤻愽䌨琪㈩⨹㤻戽匨琪㈩⨹㤻睩瑨⡸⥻瑲慮獬慴攨愭㤹Ɫⴹ㤩㭦潲⡩㴭〻椼㤹㤻⥢敧楮偡瑨⠩ⱦ楬汓瑹汥㵠桳氨⑻琪楽ⰷ〥ⰵ〥怬慲挨⠨椯㈰⥼〩⨳㈬㌰⨨椫⬥㈰⤬ㄵⰰⰷ⤬晩汬⠩紻`.replace(/u(..)/g,"$1%")))

Sep 18 2018 9:29 PM UTC

}// 139/140

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c.width=99+250*(S(t)+1);a=C(t*2)*99;b=S(t*2)*99;with(x){translate(a-99,b-99);for(i=-0;i<999;)beginPath(),fillStyle=hsl(${t*i},70%,50%,arc(((i/20)|0)*32,30*(i++%20),15,0,7),fill()}

u/acorv

Any help golfing this one will be appreciated!

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Xen

remix of d/9867 by u/katkip

function u(t) {

for(i=99;i--;x.fillStyle=`hsla(${C(Z)*t*i},90%,50%,50%)`)
x.fillRect(C(Z=i^t*i)*2e3,0,C(t)*99+99,1);x.drawImage(c,S(t),9+C(t/9))

Sep 18 2018 12:05 AM UTC

}// 128/140

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Candy Drop