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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

remix of d/21955 by u/KilledByAPixel

function u(t) {

for(d=i=1e4,Y=t*=99,X=t*30%2e3;i--;)x.fillRect(X+=C(d+=t&i),Y+=S(d),1,.1)

Mar 15 2021 4:20 AM UTC

}// 73/140

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Strange Gear Collection

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KilledByAPixel

remix of d/21957 by u/KilledByAPixel

function u(t) {

for(i=1e4;i--;)x.fillRect(X+=S(d+=(t^d)/1e5),Y+=C(d),1,1)}{d=X=Y=571

Mar 15 2021 2:49 AM UTC

}// 68/140

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Alien Transmission 👽

u/smtsjhr

due to transmission bandwidth limitations, aliens have to cap their dwitter codes at 70 chars

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BackendForth

function u(t) {

x.fillStyle=R(a=255,a,a,1/t)
x.fillRect(0,0,1920,1080)
x.fillStyle=R(0,0,0)
for(i=9;i--;)x.fillRect(400+i*99+S(t)*300,400+S(i*t)*t/5,50,200)

Mar 15 2021 2:13 AM UTC

}// 140/140

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Getting bleary-eyed?

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taupelink

remix of d/21950 by u/taupelink

function u(t) {

for(i=k=35;--i;x.fillRect(k*X,k*Y,w=i/t,w))f=i*t,X=f*f%60,Y=X*f%k,x.fillStyle=`hsl(${h=i*(X/7-4)*(7-Y/7)},${50+k*C(X*Y)}%,${99*S(h)*S(X)}%)`

Mar 15 2021 2:05 AM UTC

}// 140/140

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d/21971

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Xen

remix of d/21968 by u/sasaso7

function u(t) {

for(i=3e3;i--;x.fillRect(X*31,Y*30,25,25))x.fillStyle=R(r=t*t/+C((X=i%64)/3)*C((Y=i>>6)/3+t+S(X/9-t*9))*25,r/9,r,.01)

Mar 15 2021 12:22 AM UTC

}// 117/140

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[Z]one

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Xen

remix of d/21949 by u/danny@hille.dk

function u(t) {

for(t?i=2e3:c.width=w=58;i--;x.fillRect(X,Y,1,1))x.fillStyle=`hsl(${i/(S((X=i%w)/6)*C((Y=i/w)/3+t*4+C(X/Y))*9)+t*w},99%,50%,.1)`

Mar 15 2021 12:15 AM UTC

}// 128/140

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"remiix" is a term?

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sasaso7

remix of d/21962 by u/danny@hille.dk

function u(t) {

c.style.filter='(3'
for(i=3e3;i--;x.fillRect(X*31,Y*30,25,25))x.fillStyle=R(r=5*t/+C((X=i%64)/2)*C((Y=i>>6)/3+t+S(X/3-t*10))*25,r*0.2,10)

Mar 14 2021 9:19 PM UTC

}// 137/140

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Alive Pasta

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magna

remix of d/10317 by u/magna

function u(t) {

for(c.width|=i=9,Z=1,A=0;i--;x.fillRect(-560+i*100+S(t)*300,-140,50,200))x.setTransform(k=C(A)*Z,z=S(A)*Z,-z,k,960,540)

Mar 14 2021 8:46 PM UTC

}// 119/140

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#default with transformation matrix setup. Z is zoom factor, A is rotation angle.

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magna

function u(t) {

c.width=768
d=x.createImageData(20,80)
for(i=7e3;i--;)d.data[i]=(i%4==3||T(i&T(t)))*256
for(i=9;i--;)x.putImageData(d,160+i*40+S(t)*120,160)

Mar 14 2021 8:34 PM UTC

}// 140/140

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Glitchy #default LED panels (hi-res edition)

u/Xen

who put water on my screeen?
u/magna

#glitch

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sasaso7

function u(t) {

for(i=0;i<95;i++){
x.fillStyle=R(40,T(t)+20,T(t)+65);
x.fillRect(X=-55*t+i*T(t)*30,3-S(T(t)),(T(300)),500*T(t))
}

Mar 14 2021 8:22 PM UTC

}// 115/140

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Void is coming

u/Xen

welcome to the dwitter family!