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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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katkip

function u(t) {

r=Math.random;for(k=900;k--;)i=r()*192|0,j=r()*108|0,x.fillStyle=R(r()*256,r()*256,r()*256),x.fillRect(10*i,10*j,10,10)

Feb 10 2019 11:30 AM UTC

}// 119/140

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#random randomness

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katkip

function u(t) {

t||(X=0,Y=0,v=V=9);c.width^=0;x.fillRect(X,Y,39,39),x.fillRect(X-80,999,200,50),X+=V,Y+=v,Y>979?v=-9:0;Y<0?v=9:0;X<0?V=9:0;X>1890?V=-9:0;

Feb 10 2019 10:13 AM UTC

}// 137/140

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#default pong

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Xen

function u(t) {

for(c.width|=i=99,x.fillRect(0,0,3e3,2e3);i--;x.fill(x.arc(1e3+C(Z=i*t/14)*i*8,500+S(Z)*i*8,9,0,7)))x.beginPath(x.fillStyle=R(199))

Feb 8 2019 6:17 PM UTC

}// 131/140

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Orbit X demake

u/Xen

also try changing the arc radius from 9 to i

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username

remix of d/12230 by u/pavel

function u(t) {

for(c.width|=p=710/339,x.scale(i=9,9);i--;x.arc(107+q*C(a=i%2*3+~~T*p),60+q*S(a),60-q,a-=p/t,a))T=t++/2%3,q=T%1*60
x.stroke()

Feb 8 2019 11:14 AM UTC

}// 125/140

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#waitforit

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butcherfly

function u(t) {

with(x)for(i=0;i<16;i++)for(j=0;j<16;j++){
fillStyle=R(S(t+i)*180,0,S(t+j)*180)
fillRect(120*i,67.5*j,120,67.5)
}

Feb 7 2019 4:10 PM UTC

}// 113/140

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digi_bytes

remix of d/12214 by u/digi_bytes

function u(t) {

for(i=99;i--;x.fillStyle=R(i * S(t),T(t)*i,i*t))
x.fillRect(i**2 * C(i*t) + 900,i**2 * S(i**t) + 500,i * 3*S(t),i * 3*S(t));

Feb 6 2019 8:36 PM UTC

}// 125/140

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This one feels a bit more "splatterful".

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katkip

remix of d/12202 by u/katkip

function u(t) {

c.width^=0;t||(n="7");q=(7*(frame+1)).toString();n+=q[0]!=("0"==0?'0':'0')?q[0]+" "+q[1]:" "+q[1];x.font='9cm"';x.fillText(n,99-t*t*99,590)

Feb 6 2019 11:04 AM UTC

}// 139/140

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#sequence A087075 #math

u/Undefined

Doesn't the ("0"==0?'0':'0') Just evaluate to 0? In both your true and false cases, you just use 0 (as a string, for whatever reason)...

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digi_bytes

remix of d/11886 by u/katkip

function u(t) {

seed=.000000000002
c.width*=1;for(i=43;i--;)for(j=71;j--;)
x.fillRect(j*30+S(i/seed+t)*100-100,i*30+C(j/seed+t)*100-100,30,30)

Feb 6 2019 5:17 AM UTC

}// 126/140

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It tickles down in such a mezmerizing way O_O

u/pavel

.000000000002 = 2e-12

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ds0

function u(t) {

c.width*=1
r=400
for(i=r;i--;){Y=r-(2*r*i/r)
W=(2*(r**2-Y**2)**.5)*(.05*Math.random()+0.99)
x.fillRect(960-(W/2)+.8*r*S(t+.45*i),540-Y,W,4)}

Feb 6 2019 2:28 AM UTC

}// 140/140

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Master of Cards

u/ds0

I rly enjoy switching that ".45" in (t+.45*i) to other numbers

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katkip

function u(t) {

c.width*=1;f=(X,s)=>{if(s>3)x.fillRect(960+S(X)*s,540+C(X)*s,9,9),f(X-0.02*C(t+X*5),s-2)}
f(520+t,500)

Feb 5 2019 8:29 AM UTC

}// 102/140

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Electrical lighting trajectory simulation #recursive #recursion