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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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andrea270872

function u(t) {

x.fillStyle='#0EF'
for(i=1;i<~~t%8;i++)x.fillRect(1e3+8*t*S(i),500+9*t*C(i),3,3)
x.drawImage(c,0,0,2e3,1e3,T=t%1,T,2e3-2*T,1e3-2*T)

Dec 31 2020 4:31 PM UTC

}// 131/140

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snow crystals 2

u/jellyedwards

Very nicely done!
u/andrea270872

Thanks. The funny thing is that on my android phone... it crashes chrome! :D
u/DataMeta

wow!

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Pascal

function u(t) {

for(c.width|=i=k=50;i--;)for(j=k;j--;)x.fillRect(1020+200*C(p=j/k*2*3.14)*S(d=i/k*2*3.14)*T(t+d)**.5,560+200*S(d-t)*S(d+p)*T(t+d)**.5,4,4);

Dec 30 2020 10:28 PM UTC

}// 139/140

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symmetrical thing

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ciaccodavide

remix of d/21078 by u/ciaccodavide

function u(t) {

T=(k=t)?'🐸🐊🐲🐉💣💥👻':T
for(i=640;z=--i**.3;--z)x.setTransform(s=20/z+C(t)*91,0,0,s,0,0),x.fillText(T.substr(~~k*2%14,2),i%z*99-C(t),t++%z*60)

Dec 30 2020 4:05 PM UTC

}// 138/140

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rodrigo.siqueira

remix of d/6095 by u/Renaud___

function u(t) {

t?d=++f/1e5-1:f=h=i=99
for(e=4,z=2;z<3e3;z*=4)f%z==z/2?e=1:1;i+=e
x.fillRect(t*120,h-=d*S(i)*8-1,2,2e3)

Dec 18 2020 6:53 PM UTC

}// 103/140

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I was trying to remix a snowflake fractal and found mountains instead.

u/Xen

you almost beat me to my secret project i've been working on for last 2 weeks in silence ;-)
u/rodrigo.siqueira

I want to see your project u/Xen. My wishlist is to use x.drawImage(c,1,0) trick to show infinite horizontal scrolling mountains. I like this style of generative mountains since I saw them for the first time in Moon Lander game, Atari's Vanguard and Moon Patrol.

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anotherkitten

function u(t) {

c.width|=0
for(i=12;i--;x.fillStyle="#e37a",x.beginPath(x.fill()))for(j=27,D=4e3;j--;)x.arc(960,540,D*=.8,N=i*.523+S(j-S(j+t*.813)-t),N)

Dec 15 2020 8:08 PM UTC

}// 136/140

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crystalline petals

u/Xen

nice!

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New_Core

remix of d/20988 by u/New_Core

function u(t) {

for(c.width|=f=i=540;i--;x.fillRect(f/2*S(v=i/f*3)*S(w=t+i*19),f/6-i,A=7*S(v)*C(w)+8,A))x.setTransform(a=C(d=S(t)),b=S(d),b,-a,960-d*f,a*f)

Dec 14 2020 11:51 PM UTC

}// 139/140

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a swinging christmas ball

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TGY

function u(t) {

throw u.toString()
//Fair enough for quine?

Dec 12 2020 2:55 PM UTC

}// 43/140

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Quine (not golfed)

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rodrigo.siqueira

remix of d/20957 by u/KilledByAPixel

function u(t) {

for(k=c.width|=w=60;n=k--/w|0;x.fillRect(S(n**(k%w)),k%w/5|x.rotate(S(t*5)-2),1,1))x.setTransform(k%2?(v=n%9):-v,0,0,v,n*w,(n*n+t)*360%2e3)

Dec 11 2020 6:39 PM UTC

}// 139/140

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Flock of flying birds (remix of "snow fall").

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jellyedwards

remix of d/20957 by u/KilledByAPixel

function u(t) {

for(e=k=c.width|=w=60;n=k--/w|0;x.fillRect(j=k%w/12|x.rotate(k%w/1.9),S(n**j),1,1))x.setTransform(v=3+n%9,0,0,k%2?v:-v,n*w,(n*n+t*v)*99%e-w)

Dec 11 2020 10:11 AM UTC

}// 140/140

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teeny change so they fall at different rates

u/jellyedwards

#snowflake
u/jellyedwards

-5 chars for(e=k=c.width|=w=60;n=k--/w|0;x.fillRect(j=k%w/12|x.rotate(k%w/1.9),S(n**j),1,1))x.setTransform(v=3+n%9,0,0,k%2?v:-v,n*w,(n+t)*v*w%e) is it enough for u/KilledByAPixel to make them spin or sway in the wind? :)
u/KilledByAPixel

looks good!
u/jellyedwards

spinning but only 1 char left: for(e=k=c.width|=w=60;n=--k/w|0;R=-R|1,x.fillRect(j=k%w/12|x.rotate(k%w/1.9+R*t),S(n**j),1,1))x.setTransform(v=n%9,0,0,R*v,w*n,(n+t)*v*w%e)

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MrHaila

function u(t) {

c.width^=0
x.translate(960,540)
for(i=0;i<50;i++){
x.lineWidth=(S(t*i/9)+2)*4+i*2
b=(i*1+S(S(t))/(9-i)*20)*100
x.strokeRect(-b/2,-b/2,b,b)
}

Dec 6 2020 8:54 PM UTC

}// 140/140

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Critical framing