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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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danny@hille.dk

function u(t) {

w=c.width=56;for(i=2e3;i--;)x.fillRect(X=i%w,Y=i/w|0,1,Math.min(Math.hypot(X-29-
S(t)*29,Y-16-C(t/2)*16)/16,(X|Y)%256/64))

Jan 31 2021 6:54 PM UTC

}// 122/140

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u/smtsjhr

great effect!

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erin

remix of d/21477 by u/Qwitter

function u(t) {

w=c.width=1920;N=70;for(j=3e3;j--;){X=(j%N)*15;Y=((j/N)^0)*15;x.fillRect(X+4*(X/120*Y/100)+90,Y+40*S(X/N-7*t)+55,9,9);}x.fillRect(N,4,9,w)

Jan 30 2021 10:56 PM UTC

}// 138/140

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flag, but i can't figure out how to have the left side not move, if anyone has ideas feel free to remix!

Show more comments…
u/erin

#flag
u/danny@hille.dk

just have your y movement be a function of x -> w=c.width=1920;N=70;for(j=3e3;j--;x.fillRect(X+4*(X/120*Y/100)+90,Y+X*.1*S(X/N-7*t)+55,9,9))X=(j%N)*15,Y=((j/N)^0)*15 x.fillRect(N,50,9,w)
u/danny@hille.dk

for(j=w=c.width|=N=60;j--;x.fillRect(X+4*(X*Y/8e3)+90,Y+X*.1*S(X/N-7*t)+55,9,9))X=j%N*15,Y=j/N*20;x.fillRect(N,50,9,w)
u/erin

o wow there we go
u/erin

room for color too
u/Qwitter

nice!

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Qwitter

remix of d/21474 by u/Qwitter

function u(t) {

eval(unescape(escape`𣤽𞔹𞵦𫵲𚅪🔱𜴸𝤻𪤭𛔻𚔨𬤽𞄰𚤨𜔫𪤯𣥞𜄩𛅨🕪𚤷𛵎𛅲𚴽𞔹𚥃𚅨𛔵𚥴𚔬𪄫🔲𝔪𣕡𭅨𛥲𨕮𩅯𫔨𚔬𮄮𩥩𫅬𤵴𮕬𩔽𘥨𬵬𚄢𚴨𣤪𠴨𜴪𭄫𬤯𣤫𪄩𚴱𜤰𚔫𘤬𝴰𙔬𝔰𙔬𛤳𚔢𛅸𛥦𪕬𫅒𩕣𭄨𞔶𜄫𬤪𠴨𪄩𛄵𝄰𚵲𚥓𚅨𚔬𬤯𜔰𛅲𛴱𜄩𚔊`.replace(/u../g,'')))

Jan 28 2021 7:06 PM UTC

}// 133/140

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Into the Wardrobe

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rodrigo.siqueira

remix of d/21456 by u/rodrigo.siqueira

function u(t) {

f = (X,Y,n=120)=>T(S(X+Y/5)*2)<9 ? f(X*X-Y*Y,2*X*Y+.7,n-2):n
for(var i=1920;i--;) {
 x.fillRect(i,t*120,.5-f(i/40000-.45,t/300+.205)/40,2)
}

Jan 27 2021 1:28 PM UTC

}// 140/140

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Black&white #julia noir #fractal noise (code not golfed)

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Xen

remix of d/17628 by u/Cloud

function u(t) {

c.style.filter=`blur(19px)contrast(3)`
for(c.width|=i=1e3;i--;x.fillStyle=R(i*t%z^i,i*t%z,i))x.fillRect(1e3+1e3*S(t*i),1e3*C(t**i),z=199,z)

Jan 26 2021 5:52 PM UTC

}// 139/140

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Early Universe 1

u/danny@hille.dk

...that escalated quickly - loving it!
u/Xen

was a rather large expansion almost instantly :-O

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Qwitter

remix of d/21381 by u/danny@hille.dk

function u(t) {

w=c.width=64;for(i=2304;i--;(i<9*w||i>26*w)||x.fillRect(X=i%w,Y=i/w^0,1,.1*T(t)*S(t*Y**2*X**2)+.7*C(((X-32)**2+(Y-18)**2)**.5-15*t)));

Jan 23 2021 2:28 PM UTC

}// 135/140

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Disintegrations

u/danny@hille.dk

Sweet

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Pascal

remix of d/21360 by u/danny@hille.dk

function u(t) {

c.width=48;for(i=1296;i--;x.fillRect(X,Y,1,1))X=i%48,Y=(i-X)/48,x.fillStyle=R(0,o=255*(S(X/10+Y/15)*S(X/20+t+S(2*t+Y/5))),127+o)

Jan 21 2021 10:08 PM UTC

}// 129/140

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smurf lava lamp

u/danny@hille.dk

That looks amaizing!!!
u/danny@hille.dk

WebGl version -> http://glslsandbox.com/e#70768.0

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ciaccodavide

remix of d/21321 by u/New_Core

function u(t) {

for(c.width|=a=i=99;i--;x.fillStyle=R(0,0,0,Z/4),x.fillRect(945+(i*20+a*S(u+t)-945)*Z,510+(a*C(u)-15)*Z,Z*9,Z*40))Z=2**T(t/9+(u=~~(i/9)))

Jan 20 2021 10:12 AM UTC

}// 137/140

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#default field with fade-in

u/Qwitter

nice misty mix!

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marc8

function u(t) {

c.width=628
for(i=-4;i<5;i+=.03){x.fillStyle=(i+4)%2<1?'blue':'tan'
for(j=77;j<549;)x.fillRect(++j,200+C(j/99)*i*(j<158||j>467?22:28),1,1)}

Jan 17 2021 7:00 PM UTC

}// 140/140

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Ceci n'est pas un bonbon

u/marc8

#candy

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New_Core

function u(t) {

c.style.filter='contrast(9)invert('
c.width=32
for(i=4;i--;x.fillText("D W I T T E R",40-a,i%2*8+8))x.fillText("😲",9*i-4,a=(t*60+i%2*50)%99)

Jan 17 2021 1:48 AM UTC

}// 140/140

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u/Xen

love it!
u/codingsilver

wow!!