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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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Tekmap

remix of d/18262 by u/KilledByAPixel

function u(t) {

for(j=99;j--;S=540)for(q=X=j%2?X:A=T(B=T(T=Math.random)*2-1)*3-2,Y=B,i=S;q*X*i--;j%2&&x.fillRect(850-S*X,Y*S+S,.5,1))X=X*X-Y*X+(Y=2*X*Y+B,A)

Jun 16 2021 6:22 PM UTC

}// 140/140

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Tekmap

remix of d/1759 by u/kchplr

function u(t) {

for(c.width^=0,i=3e3;i--;e=S(t*.7)/50,z=99+T(i*2+r*e)*600,y=S(C(i+t)),x.fillRect(1e3*(1+y),r*2.5+400+z*y/2,y*8,y*7))r=i/30

Jun 16 2021 4:33 PM UTC

}// 122/140

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ciaccodavide

function u(t) {

eval(unescape(escape`𭀿𚁴🠴𙠦𚁁𛡳𪁩𩡴𚀩𚐩𞡁👛𧐊𨰮𭱩𩁴𪁼👘👴𙐱𛐮𝐊𠐮𬁵𬱨𚁻𦀬𦐺𛑘𚡴𙐮𞐹𯐩𒡋👪🐾𣑡𭁨𛡬𫱧𚀲𛠵𚠨𪠪𪠩𚠪𛠵𚐪𚀨𪠾𜀩𚠲𛐱𚐊𠐮𫑡𬀨𨐽🡸𛡬𪑮𩑔𫰨𞐶𜀫𚁡𛡘𚰽𢰨𨐮𦀩𚐬𝐴𜀫𚁡𛡙𚰽𢰨𨐮𦐩𚐩𚐊𮀮𬱴𬡯𪱥𚀩`.replace(/u../g,'')))

Jun 11 2021 11:32 AM UTC

}// 130/140

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Infinite sketched corridor

u/taupelink

whoa

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Tekmap

remix of d/978 by u/andy

function u(t) {

a=b=>C(t*b)*128+128
x.fillStyle=R(a(1.2),a(8),a(6))
x.fillRect(S(t*5)*960+960,C(t*2.5)*539+539,10,10)
x.drawImage(c,S(t)-2,C(t)-2,1924,1084)

Jun 10 2021 12:33 AM UTC

}// 140/140

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Trip #LSD

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Tekmap

remix of d/23068 by u/Tekmap

function u(t) {

with(x)for(c.width|=i=1e3;i--;beginPath())fillStyle='hsla('+i+',99%,50%,10%',x.arc(T(t+i/50)*i+960,S(t*2+i/50)*i+540,i/9+2,0,7),fill()

Jun 9 2021 12:23 AM UTC

}// 134/140

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Hyperbolæ var w.sinus

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Tekmap

remix of d/23059 by u/Tekmap

function u(t) {

c.width=1920
for(k=9;k--;)
for(i=10;i--;)for(j=75;j--;)x.fillRect(720+i*5+120/(1+2**(-72*C(t+k/9*t)+j))+k*100,540+j*8,5,8)

Jun 8 2021 3:15 PM UTC

}// 122/140

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andrea270872

remix of d/23050 by u/andrea270872

function u(t) {

c.width|=f=n=>{x.fillStyle=R(250,K=S(t)**2*99+n/4,50);n>1?x.fillRect(500-n/2+S(n)*3,n-C(n)*3,n,n)+f(n-(5+t%3)**2):0}
f(256)

Jun 8 2021 9:54 AM UTC

}// 123/140

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ciaccodavide

remix of d/23049 by u/ciaccodavide

function u(t) {

for(c.width=i=540;i--;x.lineTo(i,160+80*C(t/9)+20.5*S(S(.06*i+t))+9*C(i/9)));x.fill()

Jun 8 2021 9:45 AM UTC

}// 86/140

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u/Xen

for(i=c.width^=5e3;i--;x.lineTo(i,i%i*C(i%t)^i*S(i%t)));x.fill()

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magna

remix of d/23042 by u/magna

function u(t) {

p=n=>{a=0;for(i=n-1;i>1;)a+=!(n%i--);return a}
x.beginPath();q=t*3;r=q/Math.PI*9;x.arc(960+C(q)*r,540+S(q)*r,p(q|0),0,7);x.fill()

Jun 7 2021 10:51 PM UTC

}// 129/140

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Spiral graph of number of prime factors

u/magna

Change it to p(q|0)+1 for the real count.

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Tekmap

remix of d/17501 by u/rodrigo.siqueira

function u(t) {

for(a=b=i=1e4;i--;x.fillRect(960+99*a,540+99*b,.3,1))S(i*i*t)>0?[a=S(b)*9,b=S(S(a/3)*3)*3+C(S(t)*i)]:a=T(i%2*-b)*5-a/4,x.fillStyle=R(i%2*99)

Jun 5 2021 1:27 PM UTC

}// 140/140

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var w.Tangent fn