Dweets awesomed by u/whackashoe

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: #ScaryMovies

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yokljo

function u(t) {

x.fillRect(0,0,c.width=w=2e3,w)
n=50
for(j=5*S(t);j<n;j+=1)for(i=0;i<120-j;i++)x.clearRect(n+j*60*S(t/n*j/i),540+C(t/50*j+i)*j*7,i/9,i/9)

Dec 2 2017 12:25 PM UTC

}// 137/140

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u/Xen

nice :-)
u/donbright

glitter effect is really nice

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Xen

function u(t) {

for(c.width|=Z=i=2e3;i--;x.rotate(C(i+t)/99))x.fillRect(0,i,Z,1),x.fillRect(i*2,0,1,Z)

Nov 26 2017 8:45 PM UTC

}// 86/140

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Unity-Aura

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Xen

function u(t) {

x.drawImage(c,0,Z=C(t*3)*99),x.fillRect(0,540,2e3,Z);x.fillStyle=`hsl(${t*199},99%,49%)`

Nov 24 2017 5:21 PM UTC

}// 88/140

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The 2-Color-Decider!!!!!! or some cool name like that...

u/Xen

imagine walking down the street and liam neeson jumps out of a window and grabs you by the shirt demanding two colors... i got your back here.

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Xen

remix of d/3569 by u/whackashoe

function u(t) {

t?x.drawImage(c,S(t)*t,p=9):X=w=c.width*=2;for(x.fillStyle=`hsl(${X},93%,49%)`;++X^w&&++p<w;b=(X>>=1)&1,X^=-b&t*w)x.fillRect(X%w*t,X/w,.2,4)

Nov 24 2017 4:49 PM UTC

}// 140/140

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UltraDweet. Try fullscreen, it slowly gets faster...

u/whackashoe

nice! its a lfsr, i have feeling you can do pretty neat patterns with it with correct constant but i didnt have time to mine it out... the 2d mapping part i think could be used for some really cool stuff

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whackashoe

remix of d/3568 by u/whackashoe

function u(t) {

t?p=0:X=w=c.width/=3;for(x.fillStyle=`hsl(${t*w},99%,19%)`;++X^w&&++p<w;b=(X>>=1)&1,X^=-b&w*t)x.fillRect(X%w*t,X/w*t,1,1);x.drawImage(c,0,1)

Nov 24 2017 1:33 PM UTC

}// 140/140

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whackashoe

function u(t) {

t?p=0:X=w=c.width/=3;for(x.fillStyle=`hsl(${t*w},99%,19%)`;++X^w&&++p<w;b=(X>>=1)&1,X^=-b&w+t*9)x.fillRect(X%w,X/w,1,1);x.drawImage(c,0,5.5)

Nov 24 2017 1:25 PM UTC

}// 140/140

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Tower in rainbow world

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whackashoe

remix of d/3563 by u/whackashoe

function u(t) {

if(t%6<1){m=new Array(c.width=480).fill(X=0);R=(t).toString(2).split``}m[X++]=1,m=m.map((v,i)=>x.fillRect(i,X,v,v)|R[m[i-1]+v*4+m[i+1]*2])

Nov 24 2017 11:30 AM UTC

}// 138/140

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Watch through the 2 blank slates for more fun ones

u/Xen

very good idea.

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cantelope

function u(t) {

for(w=(i=c.width|=0)/2,x.globalAlpha=.07;i--;x.fillRect(w+(i%7-3)/Z*w-(s=(w-C(t/3)*w)/Z)/2,540+((i/7%5|0)-2)/Z*w-s/2,s,s))Z=1+(i/35|0)-t*5%1

Nov 24 2017 4:57 AM UTC

}// 140/140

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u/joeytwiddle

Nice!

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whackashoe

function u(t) {

t%6|0?X++:m=new Array(s=c.width=480).fill(X=0)
m=m.map((v,i)=>x.fillRect(i*9.7,X*1.15,v*7,v)|(t).toString(2).split``[m[i-1]+v*2+m[i+1]*4]|0)

Nov 23 2017 9:35 PM UTC

}// 140/140

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BriSeven

function u(t) {

if(!t)d=[];c.width=1920;X=Y=0; for(i=0;i<1e4;i++) D=(d[i]||1),d[i]=D+S(D*t*i)/9, x.fillRect(X+=C(d[i])*5, Y+=S(d[i])*5, 5, 5)

Nov 23 2017 8:16 AM UTC

}// 125/140

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A mutating (pseudo)random walk.

u/magna

Awesome!
u/donbright

brilliant

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