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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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AdamLantz

function u(t) {

x.font="1080px Arial"
x.fillStyle="tomato"
x.fillText("hot dogs",0,820,1920)

Mar 15 2019 5:25 PM UTC

}// 76/140

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Remix me.

u/andrea270872

LOL
u/Xen

Done
u/midnoclose

Done

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Xen

function u(t) {

x.drawImage(c,C(t),S(t))
for(i=9;i--;x.fillRect(Z=400+i*99+S(t)*300,400,50,200),x.strokeRect(Z,400,50,200))x.fillStyle=`hsl(${i*t},50%,50%)`

Mar 15 2019 4:28 PM UTC

}// 140/140

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#default

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marc8

function u(t) {

c.width=480
z=99
for(j=-2*z;j<2*z;j++)
{k=j<-z?j+z:j>z?z-j:0
for(i=0;i<9;i++)x.fillRect(z+i*25+S(t)*75+2*k*C(t+k/z),z+j/4,12+10*k/z,1+k/z)}

Mar 15 2019 4:00 PM UTC

}// 140/140

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#default

u/Xen

nice
u/tomxor

Eery, feels like some kind of swimming creature!

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rap2h

function u(t) {

o=127;c=200;for(i=512;i--;)x.fillStyle=R(o+o*C(t),o+o*S(t-i),o+o*T(t+i),.5),
x.fillRect(960+c*S(t+i/22*10),540+c*C(t-i),14,8)

Mar 15 2019 3:13 PM UTC

}// 125/140

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I have no idea what I am doing

u/Xen

you can edit dweets directly and it gives you an option to post as remix to give credit to the original author,, have a play about with different dweets, mess with variables or completely change draw method, feel free to join us all in the discord chat https://discord.gg/emHe6cP

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andrea270872

function u(t) {

c.width|=r=Math.random
A=[K=500,K,r()*5-2,-r()*10]
P=t?P.map(([i,j,u,v]=e)=>[(i+u)%2e3,j+v,u,v+.1,x.fillRect(i,j,8,8)]):[A]
P[K]?0:P.push(A)

Mar 15 2019 11:30 AM UTC

}// 140/140

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Particle Fountain, variable number of particles, max 500, non-repeating

u/andrea270872

Thanks to LimeLaser for the examples on the use of arrays!
u/katkip

#firework
u/LimeLaser

This is great, I dig it!

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yokljo

remix of d/12758 by u/yokljo

function u(t) {

c.width|=0
X=C(t)+16
Y=S(t)+9
x.beginPath()
x.lineWidth=9
for(i=9;i--;)Z=S(Y),Y+=C(X),X+=Z-S(t),x.lineTo(X*60,Y*60)
x.stroke()

Mar 15 2019 10:29 AM UTC

}// 126/140

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andrea270872

function u(t) {

V=t?V:4
X=t?X+V:8
V*=(4<X&X<180)?1:-1
c.width=192
a=50+S(t)*50
b='fillRect'
x[b](2,a-5,3,9)
x[b](185,a-2,3,9)
x[b](X,a,3,3)

Mar 15 2019 10:27 AM UTC

}// 123/140

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Pong for 2 (locally declared, global variable)

u/Jezza

Simple but effective! I like it!
u/Jezza

You can: b=x.fillRect;
u/Jezza

And then b(2,a-5,3,9) etc

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yokljo

remix of d/12755 by u/Jezza

function u(t) {

x.fillRect(0,0,1920,1080)
X=C(t)*4+16
Y=S(t)*2+9
for(i=9;i--;)Z=S(Y),Y+=S(X),X+=Z,x.clearRect(X*60,Y*60,3*i,3*i)

Mar 15 2019 9:24 AM UTC

}// 112/140

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I haven't actually put the time into understanding how this works, but that doesn't stop me from remixing it!

u/lionleaf

#attractor :)

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jellyedwards

remix of d/12732 by u/marc8

function u(t) {

c.width=w=320
t%=9
for(i=0;i<w;i++)z=1-(S(k=(i-w/2)/9)/k),x.globalAlpha=z*t/9,x.lineTo(i,1+z*6*t),x.fillRect(i,80,1,70)
x.stroke()

Mar 15 2019 8:25 AM UTC

}// 130/140

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added a bit of animation to it

u/DataMeta

#hiddengem

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Xen

remix of d/12748 by u/AdamLantz

function u(t) {

o=127;p=2;
for(i=200;i--;x.fillStyle=R(o+o*S(t),o+o*S(t-i),o+o*S(t+i),.5))
x.fillRect(935+S(i+t)*935,C(t+i/9)*515+515,50,i)

Mar 15 2019 7:34 AM UTC

}// 123/140

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u/tomxor

Nice colours :)
u/Xen

Thank you