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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: #Opposites

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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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lewdev

remix of d/32086 by u/lewdev

function u(t) {

t?0:i=0;c.before(' NeverGonna '+'GiveUUp,LetUDown,RunAround&DesertU,MakeUCry,SayGoodbye,TellALie&HurtU'.split`,`[i++%6])

Jul 13 2024 2:26 AM UTC

}// 120/140

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#rickroll within 140 characters using c.before( 🤣

u/Joachim

u/lewdev lol good job! Slightly smaller --> c.before(' NeverGonna '+'GiveUUp,LetUDown,RunAround&DesertU,MakeUCry,SayGoodbye,TellALie&HurtU'.split,[~~(t*60)%6])
u/lewdev

Hehe, nice u/Joachim! Everyone should check out your js1024 entry: https://js1024.fun/demos/2024/4/readme
u/Joachim

u/lewdev thanks a lot, I'm glad you like it! Yours is great too!

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384.cz

function u(t) {

c.width|=1
x.lineWidth=9
x.fillStyle="#00f"
for(i=99;i--;)x.lineTo(1e3+(a=S(i/9|i&t*4))*1e3,500+S((a*99)&i&t*6)*500)
x.fill()
x.stroke()

Jul 8 2024 7:26 PM UTC

}// 136/140

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Laggy

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Xen

function u(t) {

t?c.before(" "+(x+=y)+" "+(y+=x)):x=y=1

Jul 8 2024 4:30 PM UTC

}// 39/140

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Certain its been done before

u/cantelope

#fibonacci
u/cantelope

equivalent, with "template literals" ;) t?c.before(` ${x+=y} ${y+=x}`):x=y=1
u/lewdev

Nice! c.before( is new to me!

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timothytomato

function u(t) {

eval(unescape(escape`楦⡴㵛砮景湴㴧㕥洢✬❴敬氠愠汩攦桵牴⁹潵✬❧楶攠祯甠異✬❬整⁹潵⁤潷渧Ⱗ牵渠慲潵湤♤敳敲琠祯甧Ⱗ浡步⁹潵⁣特✬❳慹⁧潯摢祥❝嬨⡦㵦牡浥⤯㘰⤥㘫ㅝ⥸⹦楬汔數琨❮敶敲⁧潮湡‧⭴ⰹⱦ⤠`.replace(/u([^D].)/g,'$1%')))

Jun 30 2024 12:29 AM UTC

}// 140/140

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hmmmm

u/cantelope

#rickroll

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taupelink

remix of d/31679 by u/taupelink

function u(t) {

f=u=>((u%6-3)**2-4-Y/6)**2/3|0;for(i=1e4;i--;x.fillRect((i>>2)%9*240+9*r*C(h),i%5*240-9*Y,t<8,f(r-Y)==f(r/4+22*h)))r=i*t%13,h=r*i%7,Y=r*S(h)

Jun 20 2024 9:46 PM UTC

}// 140/140

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d/32044

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taupelink

remix of d/31997 by u/taupelink

function u(t) {

g=n=>((((X*n/4%4-2)**2-(Y/n%4-2)**2)**2)**2-(90-Y>>3))**2>>4;for(i=2e4;i--;x.fillRect(15*X,15*Y,t<6,!(g(1)+g(4)-g(2)&Y)))X=i*t%128,Y=X*i%72

Jun 18 2024 2:58 AM UTC

}// 139/140

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d/32035

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rsc

remix of d/29671 by u/rsc

function u(t) {

h=216;for(c.width|=i=0;i<9;i++)for(j=-1;j++<5;x.fillStyle=`hsl(${i*20+t*h},${(j+1)*15}%,50%)`)x.fillRect(i*h,(j-1)*h,h,h)

Jun 16 2024 8:42 PM UTC

}// 121/140

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Shaved 10 bytes

u/magna

-23: d/32038

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taupelink

remix of d/31976 by u/taupelink

function u(t) {

g=n=>((((X/n%4-2)**2+(Y*n/4%4-2)**2-4)**2-8)**2-20)**2>>5+i%3&94;for(i=2e4;i--;x.fillRect(24*X,24*Y,t<8,g(1)+g(4)==g(2)))X=i*i*t%80,Y=X*i%45

Jun 9 2024 2:24 AM UTC

}// 140/140

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d/31977

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taupelink

remix of d/31930 by u/taupelink

function u(t) {

f=u=>((u%4-2)**2-3)**2;g=n=>f(X/n)+f(Y*n/8)&7+!(i%9);for(i=3e4;i--;x.fillRect(192+16*X,28+16*Y,t<8,g(1)+g(8)==g(2)+g(4)))X=i*i*t%96,Y=X*i%64

Jun 6 2024 1:56 AM UTC

}// 140/140

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d/31959