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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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alexsav

remix of d/34522 by u/alexsav

function u(t) {

eval(unescape(escape`𩡯𬠨𭀿𢠽𦱢👃𚁔𚐬𫱮𫑯𭑳𩑭𫱶𩐽𩐽🡔👥𛡸𛰹𜀬𨐽𤰨𥀩𛁯𫡫𩑹𩁯𭱮👥🐾𚁘𚰽𢡛𪐽𩐮𭱨𪑣𪀦𝡝𛁚𚰽𢡛𪐫𜠦𝡝𚐬𛑢𛁶👷👣𛡷𪑤𭁨🐴𞀰𛀭𨑝𞡘👚🐹𞱶𞱒🱸𛡦𪑬𫁒𩑣𭀨𭠬𤠭𛐬𚁘𚱈𚡡𛑢𚠨𥠽𭠭𭰯𜠩𙡚𛑖𚡡𛑢𚡈𚐯𞐦𝀬𜐩𞡒👷𯁶𛐭𚑈👒𛐱𜰵`.replace(/u../g,'')))

Nov 15 2025 3:46 AM UTC

}// 140/140

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flyover

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New_Core

function u(t) {

O="👻"
eval(unescape(escape`𥰽𜐹𜠰𛱸𛡣𨑮𭡡𬰮𨱬𪑥𫡴𥱩𩁴𪀊𭀿𫱮𫑯𭑳𩑭𫱶𩐽𩐽🡔👥𞡣𛡨𩑩𩱨𭀽𨐽𜐳𩐳𒡸𛡣𫁥𨑲𤡥𨱴𚀰𛀰𛁡𛁢🐱𝀰𜀩𒡸𛡤𬡡𭱉𫑡𩱥𚁣𛀰𛁩👢𚱴𚠶𜀥𞀪𨠬𨐬𨠬𜀬𜀬𨐬𨠩𒡸𛡦𫱮𭀽𘠶𨱭𘀧𘠊𮀮𩡩𫁬𥁥𮁴𚁏𛁔𛡸𚡗𛐱𝐰𛁔𛡹𚡗𚱩𚰹𞐩`.replace(/u../g,'')))

Nov 5 2025 6:24 PM UTC

}// 140/140

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Ohno, halloween was over...

u/joeytwiddle

In some racing games, on your second lap you can see a ghostly figure of yourself repeating what it did the first time around. This reminded me of that.
u/ximavus

I like those slinky physics ones
u/cantelope

#underrated

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rodrigo.siqueira

remix of d/34469 by u/rodrigo.siqueira

function u(t) {

eval(unescape(escape`𩡯𬠨𫐽𫠽𞁥𜰬𪐽𜁼𭀪𞐹𛁪🐰𞱮𛐭𞱸𛡦𪑬𫁒𩑣𭀨𚀠𪠦𙡩𛰳𞐪𤰨𭀫𪠩𚰹𝠰𚱡𚡃𚁪𚐩𛁪𙠦𝐴𜀭𪐯𜠹𚡃𚁴𚱪𚐫𨐪𤰨𪠩𛁷👪🱓𚁪𚱮𛰷𜀰𚐪𨐯𞀳𞡭𛁷𚐬𪠽𪐪𪐫𚰬𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮱩𛰸𜁽𛀹𞐥𛀤𮱮𙠦𝐰𯐥𨀩𨐽𜐱𝠰𚡮𛱭`.replace(/u../g,"")))

Oct 30 2025 6:44 PM UTC

}// 132/140

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Dynamic double #spiral

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rodrigo.siqueira

remix of d/34407 by u/New_Core

function u(t) {

with(x)for(j=50,setTransform(2,0,0,2,960,540),drawImage(c,-960,-540);j--;beginPath(fill()))fillStyle=R(200-j*4),arc(S(t/3)*8,S(t/2)*9,j,0,7)

Oct 11 2025 3:48 PM UTC

}// 140/140

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Deep red

u/cantelope

#loonytunes
u/ximavus

true

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ximavus

remix of d/34331 by u/ximavus

function u(t) {

x.lineWidth=t*5
onmousemove=m=>{X=m.x*3.4;Y=m.y*3.4}
x.lineTo(X,Y,9,9);x.stroke()

Oct 3 2025 1:26 PM UTC

}// 81/140

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Too watery paint

u/lewdev

To avoid the ReferenceError: X is not defined error and having to initialize variables, you can swap X and Y with R and T since you aren't using them and are already declared.
u/ximavus

oh nice

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ximavus

function u(t) {

for(i=1e3;i;i--)x.fillRect(S(i)**t*c.width,C(i)**t*c.height,5,5)

Oct 2 2025 6:28 PM UTC

}// 64/140

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Play around with the code!

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lewdev

remix of d/4368 by u/DasSchafImWolfspelz

function u(t) {

for(b=t*3,i=4,x.font="4in'";i--;)x.fillText([..."🃏🎴"][i%2],t*300+i*400,350+700-1/b*Math.abs(S(b))*700+i)

Oct 1 2025 11:33 PM UTC

}// 104/140

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Solitaire win screen attempt

u/ximavus

nice!
u/lewdev

Thanks. I wanted to have cards constantly jumping out but I lost steam.

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rodrigo.siqueira

remix of d/34369 by u/rodrigo.siqueira

function u(t) {

c.style.filter=`sepia(.2`
if(t<1)for(n=i=30240;i--;x.fillRect(960+340*l*S(q=i/400+S(i/t)),840*C(l/1.63)*S(q+l/5)*C(q)+500,.4,1))l=i/1.21e4

Sep 30 2025 1:47 PM UTC

}// 138/140

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lewdev

remix of d/34344 by u/Axioplase

function u(t) {

for(x.reset(i=27),x.font="1in'";i--;)x.fillText("█░▒▓"[(0|9*t+i*(0|t))%4],500+i%9*99+S(t)*500,500+~~(i/9)*115)

Sep 25 2025 9:05 PM UTC

}// 110/140

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#default #blocks (golfed -13b)

u/joeytwiddle

Good golfing

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KilledByAPixel

function u(t) {

z='🐈'
eval(unescape(escape`󨼮󭽩󩍴󪌽󭼽󝜰󜌊󩭯󬬨󪬽󜜹󞽪󛜭󞽸󛭦󪝬󫍔󩝸󭌨󮬬󜬸󜌬󜜵󝜫󤼨󭌪󜬩󚬹󞜩󚝦󫽲󚍸󛭦󪝬󫍓󭍹󫍥󟝠󪍳󫌨󙍻󪬪󪭽󘌹󞜥󙍻󪬦󙬵󜍽󙝠󛍩󟝷󞽩󛜭󞽸󛭦󫽮󭌽󙼳󩝭󘬧󚝸󛭦󪝬󫍒󩝣󭌨󪜬󜬲󜌭󠼨󪜯󝜰󛝴󚬴󚜪󜼹󚼨󪬦󙭪󚭪󚽷󛝩󚽴󚬲󜌰󚜥󞜹󛌱󛌹󚜻`.replace(/u../g,'')))

Sep 15 2025 2:02 PM UTC

}// 140/140

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Play L1ttl3 Paws! 🐾 https://js13kgames.com/2025/games/l1ttl3-paws