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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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xem

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪀽𜐹𞐻𮀮𩡩𫁬𤱴𮑬𩐽𤠨𜐷𝰬𝀲𛀵𜠩𞱰👮𩑷𘁐𨑴𪀲𡀨𙱍𜐷𘀱𜡌𜐲𘀲𝡌𜐶𘀲𝱌𞀠𝠸𤐱𝐠𞀱𘀲𝰠𝰳𣀳𜰠𝀹𣀶𝐠𝀹𣀷𜠠𝰳𤐸𝠠𝰸𘀹𜀠𝠸𣀸𝐠𝀳𣀷𞐠𜰸𣀸𝀠𜰳𣀷𞀠𜐲𣀷𜀠𜐲𣀷𜐠𜠲𣀶𞀠𜐲𣀶𜐠𜐲𣀶𜀠𜐸𣀳𝠠𜐸𣀳𝐠𜐲𙰩𞱸𛡦𪑬𫀨𬀩`.replace(/u../g,"")))

Aug 10 2024 9:46 AM UTC

}// 140/140

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#js13k logo

u/KilledByAPixel

nice!

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lewdev

remix of d/29301 by u/lewdev

function u(t) {

eval(unescape(escape`󨼮󭽩󩍴󪌽󞜹󞽴󟜨󫭥󭼠󡍡󭍥󚌢󜬰󜬴󛜰󞌭󜜳󥌱󜜺󜌰󞬰󜍚󘬩󛝄󨝴󩜮󫭯󭼨󚜩󛼱󩜴󒭦󫽲󚍩󟜲󞽩󛜭󞼩󮌮󩭩󫍬󥍥󮍴󚍩󟼢󢭓󜜳󢼢󞭛󞌶󝌰󛌳󝬰󛌶󛌮󜜬󛬰󜌱󧜮󫝡󬌨󭜽󟬨󭬽󭌾󟝵󟽴󛽵󟬾󜌺󜌬󭌥󟝵󛍶󟬹󟽶󞭠󜍠󚽶󚜩󛭪󫽩󫭠󞭠󛌵󛍩󟼲󝜺󝌰󚜻`.replace(/u../g,'')))

Aug 5 2024 6:20 AM UTC

}// 133/140

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⏲ #countdown to JS13K 2024 Aug 13 13:00-Sep 13 13:00 CEST

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shandriy

function u(t) {

for(i=2,c.width=96;i--;x.fillRect(0,0,(S(t)+1)*48+(i?99:0),99))x.fillStyle=R(i*220,50,(i-1)*-220)

Aug 4 2024 1:52 AM UTC

}// 97/140

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#Opposites

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magna

remix of d/5165 by u/hoplite

function u(t) {

eval(unescape(escape`󮌮󩭩󫍬󤭥󨽴󚌰󛌰󛍩󟝷󟝣󛭷󪝤󭍨󯌽󜌬󭼩󞽸󛭴󬭡󫭳󫍡󭍥󚌹󝬰󚽓󚍴󚬮󞜩󚬹󜌬󝜴󜌫󠼨󭌪󛬷󚜪󞜰󚜻󩭯󬬨󮌮󬭯󭍡󭍥󚍴󛼹󚽃󚍴󛼳󚜩󞽩󛜭󞽸󛭣󫍥󨝲󤭥󨽴󚍃󚍡󚭡󚜪󮬫󤼨󭌪󪜩󚬹󛍃󚍡󚭷󚜪󮬫󠼨󭌪󪜩󚬹󛍷󛽩󛍷󛽩󚜩󥌽󭌪󜼹󛍺󟝷󚬹󞜯󚍩󛝔󙜱󚜬󨜽󪜫󥌭󥌥󜜻`.replace(/u../g,'')))

Aug 2 2024 5:57 AM UTC

}// 140/140

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u/lewdev

The wriggling #starfield

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shandriy

function u(t) {

for(d=m=i=(c.width=99)/33;i>0;x.fillStyle=R(0,0,255-(--i)*(255/(m+1))))for(j=100;j--;d=m-i+1)x.fillRect(j,S(j/(i*5+2)-t*d)*(d+2)+d*10,1,99)

Jul 30 2024 7:59 PM UTC

}// 139/140

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Sine #waves

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rodrigo.siqueira

remix of d/32125 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`󩭯󬬨󪜽󜝥󝌻󪜭󛜻󨼮󬽴󮝬󩜮󩭩󫍴󩝲󟝠󪝮󭭥󬭴󚍠󚝸󛭦󪝬󫍒󩝣󭌨󞜶󜌭󤼨󪼽󤼨󪜩󚭩󚜪󤼨󪜩󚬹󞜹󚭓󚍩󚽩󚜯󭌬󠼨󪼩󚬶󞜹󚭓󚍩󚽴󚜯󭌫󜼰󜌫󝌸󞌪󭌯󚌱󚽴󚬪󚍴󛼳󚜩󛌱󛌱󚜬󮌮󩭩󫍬󤽴󮝬󩜽󨍨󬽬󚌤󮽴󟌱󜬿󜜷󚭴󞬲󜜵󛝴󯜬󞜵󙜬󙍻󜼰󚽃󚍩󛼵󝜭󭌩󚬳󝝽󙜩󨌻`.replace(/u../g,'')))

Jul 18 2024 12:28 PM UTC

}// 140/140

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Growing surface

u/cantelope

#divine_horror_series

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lewdev

remix of d/32114 by u/lewdev

function u(t) {

c.width|=~x.scale(9,9)
x.fillText('NeverGonna'+'GiveUUp,LetUDown,RunAround&DesertU,MakeUCry,SayGoodbye,TellALie&HurtU'.split`,`[~~t%6],9,88)

Jul 16 2024 11:47 PM UTC

}// 140/140

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#rickroll thanks u/Joachim for the idea

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rodrigo.siqueira

remix of d/34107 by u/s1wc

function u(t) {

x.fillRect(0,0,2e3,2e3)
for(n=0;n<19;n+=.01)for(i=6;i--;)x.clearRect(n*108,540+S(n+i-t)*130*S(n/6+.1)**12,4,4)

Jul 13 2025 1:49 AM UTC

}// 110/140

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Flow lines

u/s1wc

nice effect!
u/s1wc

also thx for remixing my project

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rodrigo.siqueira

remix of d/34081 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`invert(`
for(i=1e4;i--;x.fillRect(960+C(k=i*i/3)/Z,S(k)/Z+540,.1,t<4))Z=S(i/5)/190/C(S(n=i/t))-.001/S(n)

Jul 4 2025 2:47 PM UTC

}// 120/140

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Proton energy

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katkip

remix of d/34075 by u/KilledByAPixel

function u(t) {

with(x)for(c.width|=i=7,font='4in impact',s=t,scale(s,1);i--;)for(k=9;k--;)fillStyle=R(255/k),fillText(' js1024'[i],(i*192)/s,700-9*k,218)

Jul 1 2025 10:35 PM UTC

}// 138/140

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#js1024 edition 2025 STARTED!! Theme: creepy. Details: https://js1024.fun/