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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.

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Current theme challenge: #Food

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lewdev

remix of d/34345 by u/lewdev

function u(t) {

eval(unescape(escape`睩瑨⡸⥴㽯湭潵獥浯癥㵥㴾筢敧楮偡瑨⡬楮敗楤瑨㴹⤬浯癥呯⡘ⱙ⤬汩湥呯⡘㵥⹸ⱙ㵥⹹⤬獴牯步⠩ⱦ楬氨敬汩灳攨堬夬㐬㐬〬〬㜩⥽㩘㵙㵣⹷楤瑨㵩湮敲坩摴栠`.replace(/u([^D].)/g,'$1%')))

Sep 21 2025 2:43 AM UTC

}// 122/140

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🖌️ Painting with lines (smooth) -11b, 1b short of 140b

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ximavus

function u(t) {

eval(unescape(escape`砮景湴㴧㔰灸⁁物慬✻琽捯摥⹳灬楴⠧屮✩㭦潲⡩㴱㭩㰽琮汥湧瑨ⴱ㭩⬫⤠筸⹦楬汔數琨瑛楝Ⱐ㔰Ⱐ椪㔰⤻紻`.replace(/u(..)/g,"$1%")))
x.fillRect(50, 50, 90, 90);

Sep 20 2025 3:54 PM UTC

}// 124/140

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Dwitter in dwitter!

u/ximavus

43 characters to code in it btw

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danny@hille.dk

remix of d/34331 by u/ximavus

function u(t) {

onmousemove=m=>x.lineTo(m.x*1.35,m.y*1.35),x.stroke()

Sep 20 2025 10:14 AM UTC

}// 53/140

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u/ximavus

Nice dude!
u/ximavus

I found the golden number to put instead of 1.35. Put 3.4 for non fullscreen
u/ximavus

And for fullscreen its 1.22

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lewdev

remix of d/34338 by u/lewdev

function u(t) {

eval(unescape(escape`睩瑨⡸⥴㽯湭潵獥浯癥㵥㴾筢敧楮偡瑨⠩㭬楮敗楤瑨㴹㭘☦浯癥呯⡘ⱙ⤻汩湥呯⡘㵥⹸ⱙ㵥⹹⤻獴牯步⠩㭥汬楰獥⡘ⱙⰴⰴⰮ㜸ⰰⰶ⸲⤻晩汬⠩紺⡣⹷楤瑨㵩湮敲坩摴栬堽夽〩`.replace(/u([^D].)/g,'$1%')))

Sep 20 2025 9:26 AM UTC

}// 128/140

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🖌️ Painting with lines (smooth)

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ximavus

function u(t) {

x.beginPath();
onmousemove=e=>{x.moveTo(e.x, e.y);x.lineTo(e.x*3, e.y*3);x.stroke();}

Sep 17 2025 3:24 PM UTC

}// 85/140

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Mouse demo

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DazeWare

remix of d/34288 by u/DazeWare

function u(t) {

for(i=3e3;i--;x.fillRect(i,t*99+99*S(t),.1*S(t*9),z*t))for(z=0,j=9;--j;z-=F(Y=S(t/j)*j/3-2-S(z+j)+j,X=i/7/j)+Y/5)F=k=>S(Y)*2-C(X)/5+S(X/2)

Sep 13 2025 2:58 AM UTC

}// 138/140

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rodrigo.siqueira

remix of d/34255 by u/cantelope

function u(t) {

for(x.fillRect(0,0,i=2e4,i),h=540;i--;)l=i**3+t/5,g=S(i),Z=C(l)/g+2,s=9/Z+2,x.clearRect(960+S(l)/g/Z*h*2-960,h+C(i)/Z*h,s/2,s)

Sep 5 2025 10:23 PM UTC

}// 126/140

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Daithi

function u(t) {

eval(unescape(escape`𨰮𭱩𩁴𪁼🐰𞱸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𜡥𜰬𜡥𜰩𒡦𫱲𚁩🐱𩐴𞱩𛐭𞰩𮱩𩠨𤰨𪐩🠰𛠱𚑻𮀮𩡩𫁬𤱴𮑬𩐽𨁨𬱬𚀤𮰨𝐰𛑓𚁩𚱴𚐪𝐰𚐪𜐰𯐬𞐰𙐬𝐰𙐩𨀻𮀮𩡩𫁬𤡥𨱴𚁓𚁩𚱴𚐪𚁓𚁩𚡩𚐪𜰰𜀩𚰱𩐳𛁓𚁩𚱴𚐪𠰨𪐪𪐩𚠵𜀰𚰵𝀰𛀵𛀵𚑽𯐻`.replace(/u../g,'')))

Aug 30 2025 9:31 PM UTC

}// 131/140

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Colours

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jpthinker

function u(t) {

for(k=94,i=99;i>-99;x.fillRect(960+S((i/k)*3)*300,540+C(((j=i--/k)+2*j*(j>>31))*4)*300,9,9))
x.fillStyle=R(255,0,99)

Aug 18 2025 12:35 PM UTC

}// 116/140

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Heart

u/jpthinker

#static

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Axioplase

remix of d/34199 by u/Axioplase

function u(t) {

for(I=9,w=c.width=2e3,j=I*w;j--;)x.fillRect(a=j%w,500+99*(1.001**(w-a)*Math.random()/5*(2+S(t))+S(a/99+t*3)),4,4)

Aug 13 2025 3:59 AM UTC

}// 113/140

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Rift