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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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hoplite

remix of d/27109 by u/hoplite

function u(t) {

F=(X,Y)=>S(X+C(t/2)*5)-S(Y+t)<C(t/3)||v--&&F(X*1.1,Y*1.1)*.7
for(j=w=c.width=160;j--;)for(i=w;i--;)v=9,x.fillRect(i,j,1-F(i/10-8,j/10-5),1)

Feb 23 2023 12:21 PM UTC

}// 139/140

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u/joeytwiddle

#depth

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rodrigo.siqueira

remix of d/20182 by u/danny@hille.dk

function u(t) {

with(x)for(fillRect(0,0,w=2e3,i=w);i--;strokeRect(960-i/2-i*C(t),540-i/2,i*2,i))setLineDash([i]),strokeStyle=R(lineDashOffset=w+(5*t%2*i),w)

Aug 12 2023 11:27 PM UTC

}// 140/140

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Square Spiral #Tunnel

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Xen

function u(t) {

t?Z=t*8%9:c.width=300
for(i=2e3;i--;x.fillStyle=R(0,t*Y%199))x.fillRect(i%300+S(Y=Z^i)*Z*C(i),59+i/49+C(Y)*Z*t,.1,1)

Nov 6 2018 8:02 PM UTC

}// 116/140

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just a test

u/Xen

#grass

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384.cz

remix of d/28589 by u/384.cz

function u(t) {

F=_=>("8H<I<?@??HCIC?N?MHQIQ?U@UHYHY@^;]8s:s6^3Z-:05-:%2(+($%&-&2,75:8=8F".charCodeAt(i++)-32)*19
for(i=0;1e3>i;)x.lineTo(F(),F())
x.fill()

Oct 9 2023 4:34 PM UTC

}// 139/140

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Cat #uncompressed

u/tomxor

Nice. You can definitely get this under the 100 char mark. One big saving: If you pack both X and Y into one char it will not only save you characters, but also save you the overhead of defining/calling a function.
u/tomxor

You will probably want to encode the points with -32 applied before you try to bit pack them though.

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taupelink

remix of d/24647 by u/taupelink

function u(t) {

eval(unescape(escape`景爨洽琿〺ㅥ㐻洭ⴻ砮獴牯步⠩⥘㵓⡭⤬夽匨洪洩ⱶ㴱⭓⠲㤪洩⼵⭃⠲〪洪洩⼵ⱸ⹳瑲潫敓瑹汥㵒⡩㵭┱㤷Ⱪ⽶Ⱪ⨮㠬瘪⨴⤬砮汩湥坩摴栽瘪⨱㌯ㄲⱸ⹢敧楮偡瑨⠩ⱸ⹡牣⠹㘰⨫⭘ⰵ㐰⨫⭙ⱶ⨪㤪㐬㌬〩`.replace(/u([^D].)/g,'$1%')))

Dec 30 2021 5:37 AM UTC

}// 140/140

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d/24659

u/andrea270872

very nice structures

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Mustiyani

function u(t) {

x.beginPath();
x.arc(700*t, 500*t, 50+t*20, 0, t * Math.PI);
x.arc(200*t, 500*t, 50+t*20, 0, t * Math.PI);
x.lineWidth = 3;
x.stroke();

Mar 28 2021 6:46 PM UTC

}// 135/140

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KilledByAPixel

remix of d/24965 by u/KilledByAPixel

function u(t) {

M=2,D=9
x.beginPath(S=frame)
for(i=1e3;i--;S=S*M%D)
x.arc(960,540,500,t?a=(S/D*2-.5)*Math.PI:0,t?a:9)
x.stroke()

Feb 21 2022 3:40 AM UTC

}// 112/140

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Tesla’s 3-6-9 Vortex, M=multiplier, D=modulus

u/microdance

VOLKSWAGEN

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veubeke

function u(t) {

for(Y=19;Y--;)for(X=40;X--;)x.fillRect(48*X,16+56*(Y+(X>7&X<32)*8),!Y&X+1>>1||(Y+3&7)>5&&X>2&X<5|X>34&X<37||Y>5&X>16&X<23?0:40+(X+Y&1)*8,48)

Jan 11 2020 7:39 PM UTC

}// 140/140

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#castle

u/iverjo

Amazing!
u/katkip

Awesome!

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cantelope

remix of d/34248 by u/rodrigo.siqueira

function u(t) {

for(x.fillRect(0,0,i=1e4,i);i--;x.clearRect(960+S(l+=t)/S(q=i%2<.5?n:4-n)/(Z=C(l)/S(q)+2)*(h=540),h+C(q)/Z*h,s=Z>0?4+6/Z:0,s))n=(l=i**.9)%2

Aug 29 2025 5:34 PM UTC

}// 139/140

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note: when Z is negative, the thing is behind the 'camera' and should be omitted, unless you're doing a 360° equirectangular thing... this remix omits the rear activity which would appear as particles going in the wrong direction

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atgz

remix of d/10178 by u/prplz

function u(t) {

x.strokeStyle=R(S(t/1.5)*255,S(t*3.14)*255,3e4),x.strokeRect(t*=40,t,T(t)*64,T(t+11)*64)

Oct 2 2018 1:40 PM UTC

}// 88/140

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