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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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Agnes

remix of d/8853 by u/soggypretzels

function u(t) {

c.width|=0;for(i=999;i--;){q=(i%2*2-1);x.rect(i*30-(q*t*9)-6000+q*i/9,q*300+(S(t+i/5)*99*q)-99,30,999)}x.fill('evenodd');

Jul 13 2018 8:50 PM UTC

}// 121/140

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Just showing how the weird "evenodd" argument to fill can let you not have to do globalCompositeOperation!

u/Xen

nice

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arkatect

function u(t) {

W=(S(t/2)+2)*40;for(i=1;i<7;){x.fillStyle=R(C(t)*100+200,S(t)*40+190);x.fillRect(S(t/i++)*800+990,C(t*i/5)*400+110,W,W)}x.rotate(0.006*S(t))

Jul 13 2018 1:31 PM UTC

}// 140/140

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Xen

remix of d/8812 by u/firegodjr

function u(t) {

t?x.fillRect(0,0,Z*3,99):x.translate(Z=960,540)
x.drawImage(c,-Z,-540)
x.rotate(t/Z/4)
x.fillStyle=`hsla(${t*t*Z},99%,50%,.1)`

Jul 6 2018 6:57 PM UTC

}// 126/140

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davidsharp

remix of d/8796 by u/davidsharp

function u(t) {

with(x)for(i=n=23;--i;)F=(f,m)=>Math.abs(m-t*.7*f(i*1.5/n)*2e3%(2*m)),font='90px a',fillText('⚽️🏀🏈'.substr((i%3)*2,2),F(C,1920),F(S,1e3))

Jul 3 2018 8:54 AM UTC

}// 137/140

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Remixed from @micahcowan's https://www.dwitter.net/d/8781

u/davidsharp

swap .7 for speed, for crazy things like:with(x)for(i=n=90;--i;)F=(f,m)=>Math.abs(m-t*.4*f(i*1.5/n)*2e3%(2*m)),font='90px a',fillText('🌚🌝🍀'.substr((i%3)*2,2),F(C,1920),F(S,1e3))
u/micahcowan

Using u/magna's [...font] trick in d/8783, and removing an extra invisible character that appears in the list of balls (VARIATION SELECTOR - its absence may change the ball look for some people? didn't for me), it became possible to restore the screen-clearing. with(x)for(c.width|=i=n=23;--i;)F=(f,m)=>Math.abs(m-t*.7*f(i*1.5/n)*2e3%(2*m)),fillText([...font='90px ⚽🏀🏈'][5+i%3],F(C,1920),F(S,1e3))
u/davidsharp

That's a really neat trick 👌

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magna

function u(t) {

c.height=c.width
x.font='7em"'
x.fillText('🦄',0,1080+99)
for(i=9;i--;)x.drawImage(c,i*9+S(t)*25,1080,27,99,400+i*100+S(t)*300,400,50,200)

Jul 2 2018 4:46 AM UTC

}// 138/140

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#default

u/Xen

nice!
u/Qwitter

#unicodecorn

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firegodjr

remix of d/8775 by u/yokljo

function u(t) {

with(x)for(k=2154;k--;beginPath(strokeStyle=R((S(t*2)+2)*50)))arc(540,540,k/4,v=k%4*1.57+S(t*3-k/280)+t,v+.2),stroke()
x.drawImage(c,5,0)

Jun 28 2018 6:14 PM UTC

}// 137/140

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Red Velvet Rose

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firegodjr

remix of d/8752 by u/firegodjr

function u(t) {

with(x)for(fillRect(0,0,Y=2e3,Y),k=Y;k--;)arc(960,540,j=550-k/4|0,v=k%4*3.14/2+S(t*3+Y/j)+t,v+99/k),stroke(),beginPath(fillStyle="#fff1")

Jun 26 2018 7:39 PM UTC

}// 137/140

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u/magna

#metallic

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Xen

remix of d/8722 by u/juicyslew

function u(t) {

for(c.width|=i=99;i--;)
x.fillText(t,i*19,540+5*i*S(t-i-i%t))

Jun 24 2018 11:15 PM UTC

}// 61/140

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just a few seconds....

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Xen

remix of d/8678 by u/DataMeta

function u(t) {

for(i=1e3;i--;x.fillRect(900+i*C(t+i),500+i*S(t+i),i/9,i/9))x.fillStyle=R(i*C(i%t/2),0,S(i%t)*i,.2)

Jun 21 2018 4:46 PM UTC

}// 99/140

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Shoutz 2 DataMeta

u/DataMeta

Niiiiiice! I like how it stays cohesive with a large t. Feels more refined overall

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pythech

remix of d/8630 by u/pythech

function u(t) {

c.width|=0
with(x)for(i=3;i--;stroke())beginPath(lineWidth=r=200*S(t/2)+300),arc(650+250*i,700-i%2*434,(1+C(t))*r*2,z=i*2.095,5.235+z)

Jun 17 2018 8:44 PM UTC

}// 134/140

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u/dorukcakmakci

very nice