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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magna

remix of d/33464 by u/Axioplase

function u(t) {

c.width|=0
for(X=213;X--;)for(Y=120;Y--;x.fillRect(X*9-p/2,Y*9-p/2,p,p))Z=X-44-S(t)*33,p=(Y>44&Y<68&Z>0&Z<90&Z/5&1)*4.5||S(X/4)+S(Y/4-t*4)+2

Mar 16 2025 10:32 AM UTC

}// 140/140

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Halftone #default

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Coalshork

function u(t) {

x.fillText(0,X=960,Y=540,)
x.filter="invert("
x.drawImage(c,X,0)
x.translate(X,Y)
x.rotate(3.141)
x.translate(-X,-Y)

Mar 14 2025 5:36 PM UTC

}// 116/140

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#waitforit

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Axioplase

function u(t) {

c.width=w=1920;h=1080;for(j=0;j<h;j+=9){k=(6*j/h)-4;for(i=0;i<w;i+=9){l=i*10/w;if((C(l)>k)&&Math.random()*9*S(t)>l){x.fillRect(i,j,5,5)}}}

Mar 14 2025 2:56 PM UTC

}// 138/140

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Axioplase

remix of d/33466 by u/rodrigo.siqueira

function u(t) {

w=9e3;h=999;for(j=0;j<h;j+=9){k=6*j/h-4;for(i=0;i<w;i+=9){if((S(w|i/42)>k)&&T(i*i/t*j)**5>9){x.fillRect(i,j-8,(S(j/99)-t%4)*4,8*S(t*j/i))}}}

Mar 14 2025 10:40 PM UTC

}// 140/140

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Nightfall

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rodrigo.siqueira

remix of d/33464 by u/Axioplase

function u(t) {

w=1928;h=999;for(j=0;j<h;j+=9){k=6*j/h-4;for(i=0;i<w;i+=9){if((S(w|i/42)>k)&&T(i*i/t*j)**5>99){x.fillRect(i,j-8,(S(j/182)-t%4)*4,8)}}}

Mar 14 2025 9:33 PM UTC

}// 134/140

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sky effect

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marquisdegeek

function u(t) {

eval(unescape(escape`󭌿󜌺󡼽󫭥󭼠󡽡󪝮󣭯󩍥󚍘󟝮󩝷󘍁󭝤󪝯󠽯󫭴󩝸󭌬󮽧󨝩󫬺󜌮󜌰󜽽󚜬󡼮󨽯󫭮󩝣󭌨󦌮󩍥󬽴󪝮󨝴󪝯󫬩󞽛󜌬󤼨󭌩󛍃󚍴󛼶󚜬󭌦󞌬󥌨󭌯󝼩󙜹󧜮󫝡󬌨󬜽󟭻󭽩󭍨󚍮󩝷󘍏󬽣󪝬󫍡󭍯󬭎󫽤󩜨󦌬󮽦󬭥󬝵󩝮󨽹󞬱󜜰󚬲󚬪󬝽󚜩󨽯󫭮󩝣󭌨󡼩󛍳󭍡󬭴󚍴󚜬󬽴󫽰󚍴󚼱󚝽󚜻`.replace(/u../g,'')))

Mar 15 2025 8:50 AM UTC

}// 140/140

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"A Windy Night" - Mouse down, speakers up!

u/marquisdegeek

(If the title is a bit cryptic, this is a soundscape composition, so you need to interact with the page first by clicking in the area)

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rodrigo.siqueira

remix of d/33461 by u/zachygreen

function u(t) {

t?n=0:k=m=0,F=j=>t*30%3**j/3**(j-1)|0
for(z=5;z--;)n+=F(z*2)-F(z*2+1)|0
x.fillRect(m+=C(n)*7.7,(k-=S(n)*7)+640,5,5)

Mar 14 2025 2:15 PM UTC

}// 115/140

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#uncompressed fractal curve

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zachygreen

function u(t) {

eval(unescape(escape`󪜽󭌪󝬰󯌰󒭮󟜱󒭶󟜨󪬬󬜩󟜾󚍪󙝱󚽱󚜥󬜊󫌽󪬽󟬨󭬨󪜬󜼪󚭪󚜯󜼪󚬨󪬭󜜩󚝼󜌊󩭯󬬨󮬽󜌻󮬼󝜻󮬫󚼩󮽨󟜲󚭺󒭮󚼽󫌨󪌩󛝬󚍨󚼱󚜊󫬪󟜱󛜲󚬨󭬨󪜬󜼪󚬨󪌫󜬩󚜯󜼪󚭨󙬱󚝽󒭮󚬽󜜮󜌵󒭭󟝴󟽭󚼹󚭃󚍮󚜺󜌊󪼽󭌿󪼭󞜪󤼨󫬩󞬱󜌷󜌊󮌮󫍩󫭥󥍯󚍭󛍫󚜊󮌮󬽴󬭯󪽥󚌩`.replace(/u../g,'')))

Mar 14 2025 12:56 AM UTC

}// 140/140

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u/magna

So fun to watch!

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rodrigo.siqueira

function u(t) {

for(i=3e4;i--;x.fillRect(640+X*300/Z,320+Y*300/Z,S(Z),t<7))X=(i*C(t*i))%9,Y=4*T(i/t)%7-S(X/3+S(X/2)*3)/3-3+T(i/t)/t/800,Z=2+X/30/(X*X+Y*Y-1)

Mar 11 2025 10:55 PM UTC

}// 140/140

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Waning moon #moon

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Coalshork

remix of d/1524 by u/scottglz

function u(t) {

t*=1e5,w=c.width=255;h=144;d=c.d=t&&c.d||x.getImageData(0,0,w,h);for(i=0;i<w;i++)d.data[(t>>i)|3]=i;x.putImageData(d,0,0)

Mar 14 2025 1:44 PM UTC

}// 121/140

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crosshatching #waitforit