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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katkip

function u(t) {

f=a=>b=>g=c=>c?([w,y]=g(c-1),[w*a-b*y,a*y+b*w]):"10"
c.width=100;
x.fillText(f(3)(5)(2)[0]+"+"+f(3)(5)(2)[1]+"i",30,30)
// (3 + 5i) ** 2

Feb 28 2021 3:32 PM UTC

}// 136/140

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shortest complex exponent. use it for fractals

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pbjer

function u(t) {

c.width=1920
x.font='84px sans'
T=Math.floor(t)
f='fizz'
b='buzz'
s=()=>T>0?T%15===0?f+b:T%5===0?b:T%3===0?f:T:T
x.fillText(`${s()}`,0,550)

Mar 1 2021 10:57 PM UTC

}// 139/140

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Rendered fizzbuzz

u/DaSpider

f='fizz',b='buzz',document.write(((T=t?T+1:1)%15===0?f+b:T%5===0?b:T%3===0?f:T)+', ') // a bit faster

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katkip

function u(t) {

eval(unescape(escape`𩠽𚁩𛁪𛁮🐹𚐽🡮🀰🱩𞡦𚁩𚡩𚠴𛑪𚡪𛁪𚠲𛁮𛐱𚐊𩡯𬠨𪐽𜠹𞐻𪐭𛐻𚑦𫱲𚁪🐲𞐹𞱪𛐭𞱸𛡦𪑬𫁓𭁹𫁥👠𪁳𫀨𙁻𩠨𪐯𜠹𞐭𛠵𛁪𛰲𞐹𛐮𝐩𯐬𞐹𙐬𝐰𙐩𨀩𮀮𩡩𫁬𤡥𨱴𚁩𚠳𛁪𚠳𛀳𛀳𚐻`.replace(/u../g,'')))

Feb 28 2021 5:22 PM UTC

}// 115/140

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rodrigo.siqueira

remix of d/21754 by u/danny@hille.dk

function u(t) {

for(c.width|=i=711;i--;x.lineTo(K=960+C(i-t)*440,540+280*C(i+t*2)*S(i)),x.lineTo(K+S(i+C(i+t))*360,C(i+t)*240+430))x.lineWidth=.3
x.stroke()

Feb 26 2021 4:32 PM UTC

}// 140/140

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Rotating soft thing

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erin

function u(t) {

for(d=i=540;i--;)x.fillRect(i*100+(25*t&frame/15)*25,d*t,45,9)

Mar 1 2021 3:27 PM UTC

}// 63/140

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bitwise is pretty fun!

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BackendForth

function u(t) {

x.fillStyle=t<28?"#FF0000":"#ffffff"
for(i=12;i--;){q=S(t*t/279)*15
w=i*.52+9/t+1.4**(t-30)
x.fillRect(960+C(w)*t*9-q,540+S(w)*t*9-q/2,q,q)}

Feb 27 2021 6:31 PM UTC

}// 140/140

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Peppermint? #candy

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magna

remix of d/21757 by u/Xen

function u(t) {

for(w=i=600;i--;x.beginPath(x.fill(x.arc(1e3+C(i-r)*1e3,S(i/w)*r+500,60,0,7))))x.fillStyle=R(r=S(i+t)*w,t&2?r&w:r^w,-r,.01)

Feb 24 2021 4:37 PM UTC

}// 123/140

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Partial clouds at countryside - a timelapse

u/Qwitter

last breathes on a cold day
u/Xen

nicely done Mr Magna

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ntsutae

function u(t) {

for(c.width|=j=50;j--;)for(i=6;i--;)
for(X=i*300+250,Y=j*20,k=3;k--;x.fillRect(X+=C(d)*5,Y+=S(d)*45,9,19))d=X/Y*S(t/9)*9

Feb 27 2021 9:09 AM UTC

}// 120/140

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Underwater

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Pascal

function u(t) {

for(c.width|=i=200;i--;x.closePath())z=5+S(i+t)*C(a=i*i+t/9)*4,x.arc(1e3+3e3*(C(i+t)*C(a))/z,550-3e3*(S(a))/z,30/z,0,7)
x.fill()

Feb 24 2021 5:54 PM UTC

}// 128/140

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particles

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TGY

function u(t) {

c.width=1920
x.font='100px S'
x.translate(400,400)
x.fillText(['(*_*)', '( *_)','(  *)','(   )','(*  )','(_* )'][Math.floor(4*t)%6],-30,0)

Feb 27 2021 7:18 AM UTC

}// 138/140

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eggs

u/DaSpider

Let me fix that for you c.width=555,x.font='5em S',x.fillText('('+[(s=' ')+s+s,'* '+s,'_*'+s,'*_*',s+'*_',s+' *'][Math.floor(4*t)%6]+')',200,170)
u/DaSpider

Adjust spaces in ' ', as comment apparently removes spaces.