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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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anotherkitten

function u(t) {

x.fill(p = new Path2D(),p.arc(960,540,270,0,8))

Sep 16 2020 3:02 PM UTC

}// 47/140

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Comment with something for me to add to this, will remix with one suggestion per iteration (until its too complex to continue)

u/danny@hille.dk

a tail
u/anotherkitten

tail added! d/19979

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taupelink

remix of d/19950 by u/taupelink

function u(t) {

r=Math.random;for(i=k=120;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*9)*16,x.fillStyle=R(h=k*S(S(Y*S(p=X-X*X/16)+p*S(Y))*(p&Y)+p)|i,h+=i,h+i)

Sep 16 2020 2:03 AM UTC

}// 140/140

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d/19976

u/smtsjhr

looks like farmer Bob Blue decided to wear his favourite hat and overalls today!
u/tomxor

Haha yes!
u/danny@hille.dk

anybody remember 'Duke, the Java Mascot''
u/erin

amogus

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taupelink

remix of d/19974 by u/taupelink

function u(t) {

r=Math.random;for(i=k=128;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*8)*16,x.fillStyle=R(h=k*C(3*S(Y*C(X*X/16-X)+S(Y))+5*(X*4|Y))|i,h*2,h+k)

Sep 16 2020 1:35 AM UTC

}// 139/140

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d/19975

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taupelink

remix of d/19957 by u/taupelink

function u(t) {

r=Math.random;for(i=k=128;i--;x.fillRect(k*X,k*Y,i/t,i/t))X=r(Y=r()*9)*16,x.fillStyle=R(h=k*S(2*C(Y*C(p=X-8)-p*C(Y))+(2*p&2*Y&4))|i,h^k,h+i)

Sep 15 2020 11:38 PM UTC

}// 140/140

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d/19974

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Xen

remix of d/12646 by u/qm3ster

function u(t) {

t?x.filter=`hue-rotate(${t*=49}rad)`:x.strokeStyle='red'
for(x.beginPath(r=1e3);r--;)x.lineTo(--r*S(t*=.3)+S(t/9)*r+r,r*C(t)+r);x.stroke()

Sep 15 2020 11:16 PM UTC

}// 138/140

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playing #keepsgoing

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danny@hille.dk

remix of d/19969 by u/danny@hille.dk

function u(t) {

for(c.width=X=64;X--;)for(Y=64;Y--;)x.fillStyle=R(m=128*(S(X*Y+Y/2*Y/16)/64**C(Y/8+t*2)/16),-m/9),x.fillRect(Y,X,1,1)

Sep 15 2020 7:27 PM UTC

}// 117/140

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Demonic patterns (or christmas sweater pattern) remix

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KilledByAPixel

remix of d/19967 by u/KilledByAPixel

function u(t) {

eval(unescape(escape`𭀥𜠼𛠰𜐿𠐽𦱛𞐶𜀬𜀬𝠰𧑝𞡸𛡦𪑬𫁒𩑣𭀨哶𛡭𨑰𚁡🐾𮱦𫱲𚁖👔𚁔👍𨑴𪀮𬡡𫡤𫱭𚐪𝠭𜰬𦠽𨑛𜡝𚠽𛠹𝐬𪐽𦠫𞑼𜀻𪐭𛐻𮀮𩱬𫱢𨑬𠑬𬁨𨐽𛠰𜰩𮀮𨱬𩑡𬡒𩑣𭀨𦀽𨑛𜁝𚰽𥠬𦐽𨑛𜑝𚰫𛁚𛁚𚐻𥠾𜠮𝐦𙡚🠱𙠦𠐮𬁵𬱨𚁛𦀬𦐬𦠪𥀨𚑝𚑽𚐬𜀬𥰽𜡥𜰬𥰩`.replace(/u../g,'')))

Sep 15 2020 6:51 PM UTC

}// 140/140

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Lightning Strikes ⛈️ #storm

u/danny@hille.dk

set globalalpha to .095 for a really cool effect

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danny@hille.dk

remix of d/19966 by u/danny@hille.dk

function u(t) {

for(c.width=m=X=64;X--;)for(Y=64;Y--;)x.fillStyle=R(o=99*(S((X*Y-t+Y*X)/m)+C(Y/4+t)+S(t+X/8+S(Y/2+t))),o/2,-o),x.fillRect(X,Y,1,1)

Sep 15 2020 6:14 PM UTC

}// 130/140

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Endoplasmatic remixium

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rodrigo.siqueira

remix of d/19954 by u/rodrigo.siqueira

function u(t) {

for(i=199;x.beginPath(),i--;x.fillStyle=`hsl(${i*3} 90%${S(i/28)*99}%)`,x.fill())x.arc(960+5*C(a=i/9+t*9)*(k=1.06**i),540+i*2*S(a+t),k,0,7)

Sep 15 2020 6:03 PM UTC

}// 139/140

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Spiral lights

u/magna

Stylish!

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KilledByAPixel

remix of d/19951 by u/KilledByAPixel

function u(t) {

t%1<.01?T(960,-300,80,c.width|=0):T=(X,Y,Z)=>{for(V=Math.random(i=Z|0)*6-3;i--;)x.fillRect(X+=V,Y++,Z,.9);V>2&&T(X,Y,Z/3);Z>1&&T(X,Y,Z*.98)}

Sep 15 2020 6:02 PM UTC

}// 140/140

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Lightning Strikes #storm #uncompressed