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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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taupelink

remix of d/15374 by u/taupelink

function u(t) {

c.width=320;f=(X)=>X?f(X/B|0)+"0123456789ABCDEF"[X%B]:'';k=t?k+1:8;l=k>>3;for(B=17;--B>1;)
x.fillText(B,0,10*B),x.fillText(f(l,B),30,10*B)

Aug 10 2019 9:56 PM UTC

}// 138/140

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Base 2-16 expansions. I, uh, forgot about the parseInt function :)

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taupelink

remix of d/15365 by u/taupelink

function u(t) {

c.width=500;p=[23,29,31,37][(frame>>5)%4];m=1;for(n=p,o=1;--n;x.fillText(m,30+12*m,7*o++))m*=n,m%=p,x.fillText(o-1?'x'+n+'≡':p+'-1=',0,7*o)

Aug 10 2019 7:19 PM UTC

}// 139/140

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Illustration of Wilson's theorem. For any prime p, (p-1)! is congruent to p-1 mod p,

u/joeytwiddle

😯🥴🤤

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tomxor

remix of d/15367 by u/tomxor

function u(t) {

eval(unescape(escape`瑼籸⹦楬汒散琨愽〬戽〬挮睩摴株㴴Ᵽ⹨敩杨琪㴴⤻砮晩汬却祬攽✣晦昧㭦潲⡩㴱攵㭩ⴭ㭸⹦楬汒散琨愪猭㘴〬截猫猬ㄬ⸰㌩⥲㴰簴⩍慴栮牡湤潭⡳㴲㔶〩ⱡ⬽⸳⨨爭愫截匨愪㌮ㄴ⤩Ɫ⬽⸳⨨〭愪戫䌨愪㌮ㄴ⤩`.replace(/u(..)/g,"$1%")))

Aug 10 2019 11:43 AM UTC

}// 140/140

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Chaos Photographer, Pic 2 - HQ 4K Render

u/tomxor

Takes ~4min @6fps, right-click save-image for better downsampling quality, FireFox gives smoother quantization: https://imgur.com/gallery/BnWGfDB

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taupelink

remix of d/14936 by u/taupelink

function u(t) {

c.width=500;p=37;m=1;for(n=p,o=1;--n;x.fillText(m,30+12*m,7*o++))m*=n,m%=p,o-1&&x.fillText('x'+n+'≡',0,7*o)

Aug 10 2019 4:39 AM UTC

}// 107/140

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Illustration of Wilson's theorem: 37 is prime, and 36! is congruent to 36 mod 37. #numbertheory https://en.wikipedia.org/wiki/Wilson%27s_the…

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taupelink

remix of d/14940 by u/taupelink

function u(t) {

g=(a,b)=>b?g(b,a%b):a;j=t?j+1:33;for(i=32;i--;)x.fillStyle=`hsl(${99*i%360},99%,${10*g(i,j/30|0)}%)`,x.fillRect(i%8*240,(i>>3)*270,235,266)

Aug 10 2019 4:25 AM UTC

}// 139/140

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Using a GCD formula for lightness

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DataMeta

remix of d/15356 by u/DataMeta

function u(t) {

c.width=600;for(i=360;i-=8;)for(j=360;j-=8;)h=t*t**.4,
x.fillRect(122+i,j,g=((h^i)&(j^h))**.1*t%8,g)

Aug 9 2019 11:16 PM UTC

}// 100/140

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h=64+t*t**.4

u/rodrigo.siqueira

#sierpinski

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robbyg

remix of d/15346 by u/robbyg

function u(t) {

P=Math.PI*2
for(y=12;y--;)x.fillStyle=R(0,h=y*20,h),x.fillRect(960+C(n=t/5+P/3*(y/4|0))*300+C(m=P/4*y+t)*200,540+S(n)*300+S(m)*200,4,4)

Aug 9 2019 6:24 PM UTC

}// 135/140

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Golfed and colorized for more visual interest.

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robbyg

function u(t) {

P=Math.PI*2
for(z=3;z--;)for(y=4;y--;)x.fillRect(960+C(n=P/3*z+t/5)*300+C(m=P/4*y+t)*200,540+S(n)*300+S(m)*200,4,4)

Aug 9 2019 1:00 PM UTC

}// 115/140

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Visualizing the paths of the cars on a ride at the local amusement park. 🎠

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DataMeta

remix of d/15323 by u/DataMeta

function u(t) {

c.width=560;for(i=315;i-=7;)for(j=315;j-=7;)
h=20+t/7,x.fillRect(122+i,j,g=(h&j+h&i)**.1*t%7,g)

Aug 9 2019 3:16 AM UTC

}// 95/140

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Modify 20 in 20+t/7 to start at higher or lower complexity

u/DataMeta

Different start points change the order in which "pixel" sizes stack resulting in different sequences
u/DataMeta

i.e. 10,15,56,78

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PixelPusher

function u(t) {

k=10
i=(t*600+k)%c.width;j=(t*600+k)%c.height
x.fillStyle=R(i%250,(i+j)%100,j%150)
x.fillRect(i,j,k*20,k*20)

Aug 9 2019 2:04 AM UTC

}// 108/140

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