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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.

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

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Axioplase

remix of d/33539 by u/Axioplase

function u(t) {

c.width=p=2e3;r=()=>Math.random();f=x=>9*(.5+S(t));s=9;for(i=0;i<p;i+=s)for(j=0;j<p;j+=s)if(4**-r()>i/p)x.fillRect(i+9*r(),j+9*r(),n=f(s),n)

Mar 28 2025 3:11 AM UTC

}// 140/140

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Pulse 2

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rodrigo.siqueira

remix of d/33468 by u/marquisdegeek

function u(t) {

eval(unescape(escape`𭀿𜀺𡰽𫡥𭰠𡱡𪑮𣡯𩁥𚁘👮𩑷𘁁𭑤𪑯𠱯𫡴𩑸𭀬𮱧𨑩𫠺𛠱𯐩𛁇𛡣𫱮𫡥𨱴𚁘𛡤𩑳𭁩𫡡𭁩𫱮𚐻𦱦𬡡𫑥𙐸𧐮𫑡𬀨𬐽🡻𭱩𭁨𚁮𩑷𘁏𬱣𪑬𫁡𭁯𬡎𫱤𩐨𦀬𮱦𬡥𬑵𩑮𨱹𞡦𬡡𫑥𙐳𚡾𚁴𚠴𙐶𚐪𝀪𚡱𚠨𜐭当𙐴𚑽𚐩𨱯𫡮𩑣𭀨𡰩𛁳𭁡𬡴𚁴𚐬𬱴𫱰𚁴𚰱𚑽)`.replace(/u../g,"")))

Mar 19 2025 2:15 PM UTC

}// 140/140

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Pipe Organ frame%3*~(t*4%6)*4**q*(1-~t%4) composition. (CLICK TO LISTEN)

u/joeytwiddle

#audio #music
u/joeytwiddle

That's rather pleasant!
u/cantelope

very nice!

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Axioplase

function u(t) {

k=300;for(i=0;i++<9;){l=i*28;x.fillStyle=R(l,l,l);x.fillRect(400+i*100+S(t)*k,k,50,40+(S(t)*20)*S(t)*20)}

Mar 19 2025 12:07 AM UTC

}// 105/140

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Arches

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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)
u/rodrigo.siqueira

Very interesting sound effects. Algorithmic composition has great potential for creating innovative sounds.
u/joeytwiddle

#audio

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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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rodrigo.siqueira

remix of d/33437 by u/taupelink

function u(t) {

for(i=z=9e3;i--;x.fillRect(120*t,i/8,(z/=z+i/3e4*S(z/9+i%5+t/4)+S(z)**2/9)*4,2))x.fillStyle=(z=251*T(1.5/z))&3?z&2?'#fb51':'#0009':'#a303'

Mar 7 2025 12:02 AM UTC

}// 138/140

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Abstract Landscape II

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taupelink

remix of d/33401 by u/taupelink

function u(t) {

for(i=z=8e3;i--;x.fillRect(i/4-40,120*t,.6,z/=4+S(w+i/500)))x.fillStyle=(z=15^8*S(6/z+t%3*3*S(w=z/2+t^i/800)))&1?'#3105':z&4?'#3762':'#A521'

Feb 27 2025 7:12 PM UTC

}// 140/140

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d/33427 Grid of Abstract Landscapes 2

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taupelink

remix of d/33398 by u/taupelink

function u(t) {

for(i=z=w=9e3;i--;x.fillRect(i/4-40,216*t,S(w=3+S(z-i/750)),z/=2+C(z-t)**3/w))x.fillStyle=z*S(z=18+9*C(z+i/1e3^t*w))&1+z%4/t?'#EB92':'#5321'

Feb 26 2025 6:31 AM UTC

}// 140/140

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d/33421

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tzador

function u(t) {

eval(unescape(escape`𣐽𣑡𭁨𛡲𨑮𩁯𫐊𢀽𚁗𚐽🠨𥰫𣐨𚐯𝀩𚠲𝐵𒡦𫱲𚀻𦀽𣐨𚐪𜠭𜐬𦐽𣐨𚐪𜠭𜐬𦀪𦀫𦐪𦐼𜐻𚑻𒡚👍𨑴𪀮𬱱𬡴𚀱𛑘𚡘𛑙𚡙𚐊𮀮𩡩𫁬𤱴𮑬𩐽𤠨𢀨𦀩𛁈𚁙𚐬𢀨𦠩𚐊𮀮𨡥𩱩𫡐𨑴𪀨𚐊𮀮𨑲𨰨𞐶𜀭𝐰𜀪𦀬𝐴𜀭𝐰𜀪𦐬𜰰𚡚𛀰𛀷𚐊𮀮𩡩𫁬𚀩𒡽`.replace(/uD./g,"")))

Feb 12 2025 7:51 PM UTC

}// 136/140

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RGBall

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tzador

remix of d/33112 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`𮀮𩡩𫁬𤱴𮑬𩐽𙰣𜀰𜀧𒡸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𜡥𜰬𜡥𜰩𒡦𫱲𚁩🐶𜐻𪐭𛐻𚑦𫱲𚁪🐴𜀻𪀽𤰨𪠯𜐲𚐪𚠳𚡓𚁩𛰱𞐩𚠪𝀪𝀰𜀪𤰨𭀩𛁪𛐭𞱸𛡦𪑬𫁒𩑣𭀨𝀳𜀫𚀹𚡩𚡪𛰳𜀫𪐪𜐳𚐭𝐪𪠬𮐬𝐬𝐩𚑹🐹𚡪𚰳𝠰𚱨𛁸𛡦𪑬𫁓𭁹𫁥👒𚁨𚡨𛰹𞐬𚀹𞐭𪀩𚠪𜠯𞐹𛀹𞐩`.replace(/uD./g,"")))

Feb 12 2025 9:57 AM UTC

}// 140/140

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u/rodrigo.siqueira

Perfect colors!
u/tzador

Almost, if only we had a few more bytes..
u/rodrigo.siqueira

Can you paste in the comments the larger version (with your color idea)? Maybe there are ways to save a few more bytes.. e.g.instead of 430+(9*i*j/30+i*13)-5*j you can use 500+i*j/3+i*9-j*5 (6 bytes smaller) or even 300+i*j/3+i*9 (10 bytes smaller)
u/rodrigo.siqueira

And you also save 4 bytes by using 9*j+360+h directly inside x.fillRect (instead of defining y=9*j+360+h and then using y)
u/rodrigo.siqueira

And also x.fillStyle=R() instead of x.fillStyle='#000'