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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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regaerge

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<1000;i++)
x.fillRect(400+i*100+S(t)*300,400,50,2500) // draw 50x200 rects

Feb 7 2019 7:00 PM UTC

}// 116/140

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Cool!

u/katkip

Nope, #default

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Xen

function u(t) {

for(i=199;i--;x.fillStyle=R(Z,Z-i,i/2))
x.fillRect(i*9,Z=9+C((t%9*i)/9)*99,9,9)
x.drawImage(c,0,4)

Feb 7 2019 6:18 PM UTC

}// 98/140

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just a test

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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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rnbw

function u(t) {

for(c.width^=i=0;i++<45;)for(j=-6;j++<23;x.fillStyle='#ac6'+(4+(i+j)%2*2))x.fillRect((i*(b=99+C(t)*35))+(a=S(t)*600%b)-500,(j*b)+a,d=b*.9,d)

Feb 7 2019 3:57 PM UTC

}// 140/140

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zooming tiles without transform! doesn't perform very well, though

u/rnbw

(i'm surprised that that hastily-made alpha adjustment worked...)

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ds0

function u(t) {

r=c.width*=1
for(i=9;i--;){Q=4*t+i
x.beginPath()
x.ellipse(r*(i+1)/10,540+300*S(Q),90,Math.abs(90*C(Q)),0,0,6.3)
C(Q)>0?x.fill():x.stroke()}

Feb 7 2019 3:32 PM UTC

}// 140/140

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pavel

remix of d/2336 by u/cantelope

function u(t) {

for(i=k=c.width|=0;i--;x.arc(X,Y,k*k|1/z,k=0,7))z=1-(t*30+i)%99/99,x.moveTo(X=960*(z+i**.9%1-.5)/z,Y=540*(z+i**.6%1-.5)/z)
x.fill('evenodd')

Feb 7 2019 7:27 AM UTC

}// 140/140

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Golfed enough for round bodies

u/mxfh

Welcome to the #arc side
u/13thptr

lol

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username

function u(t) {

////c.width+=0;x.font='99px a';x.fillText('wait?',99,99) <- what!





eval(code.substring(4,56))

Feb 6 2019 11:42 PM UTC

}// 97/140

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u/katkip

nice trick but the scroll bar is visible

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ds0

function u(t) {

f=frame
G=Math.floor
s=50
w=1000
for(j=f;f%--j;);j==1?x.fillStyle='red':x.fillStyle='#000'
x.fillRect(s*(f%G(w/s)),s*G(f/G(w/s)%G(w/s)),s,s)

Feb 6 2019 9:38 PM UTC

}// 140/140

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lame prime printer

u/katkip

Nice

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cantelope

function u(t) {

eval(unescape(escape`𩡯𬠨𮁛𩠽𙱦𪑬𫁓𭁹𫁥𙱝👠𘰰𜀶𜡠𛁸𛡦𪑬𫁒𩑣𭀨𜀬𜀬𭰽𜡥𜰬𭰩𛁩🐹𞐻𪐭𛐻𮀮𩡯𫡴🐹𞐫𪀯𞀫𙱰𮀠𨐧𛁸𛡦𪑬𫁔𩑸𭀨𙰪𙰬𭰭𚁩𚠪𝐫𭀪𚁷𚱨𚐯𝀩𙐳𩐳𛁩𚠪𝰥𭰫𤰨𪐫𭀪𜰩𚡩𚠳𚐩𮁛𩡝👠𪁳𫁡𚀤𮰨𪀽𪐪𪐩𚱴𚠸𜀰𯐬𞐹𙐬𝠰𙐬𙁻𜐯𚀱𚱨𛰱𩐳𚑽𨀻`.replace(/u../g,'')))

Feb 6 2019 8:45 PM UTC

}// 140/140

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u/katkip

#compressed
u/sigveseb

Cool
u/magna

I love this!
u/iverjo

Trippy! Very good
u/joeytwiddle

I knew who wrote this without looking!

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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".