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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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KilledByAPixel

function u(t) {

eval(unescape(escape`𬠽𧰽🡓𚁱𚠪𫠫𚰩𚠹𯀰𞱡👦🐾𜠪𬠨𚐪𩠨𬠨𚐪𭀩𞱔👦🐾𨐨𩠩𚱡𚁦𚐫𨐨𩠩𚰶𜀻𩡯𬠨𪰽𪐽𜐴𝀻𬐽𚁴𛰳𝠭𪐯𪰫𞐹𯀰𚐪𪐭𛐻𚁩𛑴𚠴𯀰𚐥𪰿𮀮𩡩𫁬𤡥𨱴𚁘𚱔𚁓𚐬𦐫𥀨𠰩𛁺🐲𚱲𚀩𛰹𛁺𚐺𮀮𨱬𩑡𬡒𩑣𭀨𦀬𦐬𤠽𜐲𜀬𤠩𚑘👩𙐱𝠪𤠬𦐽𚁩🠾𝀩𚡒𛁮🐳`.replace(/u../g,'')))

Jul 11 2019 3:48 PM UTC

}// 140/140

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𝕊𝕥𝕣𝕒𝕟𝕘𝕖𝕣 𝕊𝕪𝕞𝕓𝕠𝕝𝕤

u/KilledByAPixel

Each symbol uses 3 circles instead of the normal 2 for a #Spirograph.
u/donbright

damn

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Xen

function u(t) {

r=Math.random
f=z=>x.fillRect(z,t*99,9,9)
f(9+r()*99)
f(299+(r()+r())/2*99)
f(599+(r()^r())*99)
f(899+(r()*r())/r()*99)

Jul 11 2019 3:33 PM UTC

}// 119/140

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bored math test with random

u/Fime

Golfing tip: When calling a random function often you might want to use r={valueOf:Math.random} instead. You then get a new random value when accessing r like a normal variable (no () needed)
u/f8f82804

If you're willing to re-use an already-declared variable you can save a couple more characters: T.valueOf=Math.random
u/donbright

yay. #trigfree

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donbright

function u(t) {

c.width=199
for(i=199;i--;)for(j=99;j--;){
b=i*i+j*j
r=i*i-j*j
g=2*i*j
n=frame
x.fillStyle=R(r*r%n,g*g%n,b*b%n)
x.fillRect( i,j, 1,1)
}

Jul 10 2019 11:44 PM UTC

}// 135/140

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mosaic of time

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New_Core

function u(t) {

for(c.width|=i=400;i--;i%99<1?x.beginPath(x.fill()):0)b=99**S(t+i/30)+50,x.lineTo((b/S(a=i/63)+960),(b/C(a)+540))

Jul 10 2019 10:23 PM UTC

}// 113/140

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u/katkip

awesome!
u/magna

Neat!

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username

remix of d/14971 by u/username

function u(t) {

for(a=_=140;--a;x.fill()){x.beginPath(x.fillStyle=R(5*($=_*S(a+t)),$+_,$+a*2))
for(i=3;i--;)x.lineTo(960+C(z=t+T(i)+a)*a*9,540+S(z)*a*9)}

Jul 10 2019 5:04 PM UTC

}// 138/140

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shiny deadly rotation

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username

remix of d/14970 by u/username

function u(t) {

for(a=_=140;--a;x.fill()){x.beginPath(x.fillStyle=R(2*($=_*S(a+t)),$+_,$+a*2))
for(i=3;i--;)x.lineTo(960+C(z=t+T(i)+a)*a*9,540+S(z)*a*9)}

Jul 10 2019 5:02 PM UTC

}// 138/140

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icy deadly rotation

u/username

you can increase the 2 in 2*($.. to add some warmth

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username

remix of d/6323 by u/yonatan

function u(t) {

for(a=_=140;--a;x.fill()){x.beginPath(x.fillStyle=R($=_*S(a+t),$+_,$+a))
for(i=3;i--;)x.lineTo(960+C(z=t+T(i)+a)*a*9,540+S(z)*a*9)}

Jul 10 2019 11:18 AM UTC

}// 132/140

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deadly rotation

u/username

#randomremix no 20

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username

remix of d/14968 by u/username

function u(t) {

for(i=20;i--;)for(j=12;j--;x.fillRect(i*100-s,j*100-s,s*2,s*2))s=S(S(t)*i+j)*25*C(t)+45*S(t),x.fillStyle=`hsl(${s+t*9},84%,50%`

Jul 10 2019 11:16 AM UTC

}// 127/140

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username

remix of d/14967 by u/username

function u(t) {

for(i=20;i--;)for(j=12;j--;x.fillRect(i*100-s,j*100-s,s*2,s*2))s=S(S(t)*i+j+T(t))*25+25,x.fillStyle=`hsl(${S(C(t)/2)*s*7},84%,50%`

Jul 9 2019 6:51 PM UTC

}// 130/140

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that's better

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username

remix of d/4139 by u/AliYil

function u(t) {

for(i=20;i--;)for(j=12;j--;x.fillRect(i*100-s,j*100-s,s*2,s*2))s=S(S(t)*i+j+T(t))*25+25,x.fillStyle=`hsl(${S(t*C(t))*s*3},84%,50%`

Jul 9 2019 6:49 PM UTC

}// 130/140

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#randomremix no 19 - yep, that worked