Dweets awesomed by u/quuxman

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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phillipcool

remix of d/5056 by u/ellisk1

function u(t) {

x.fillRect(0,0,q=c.width=2e3,q);for(i=q*2;i--;){r=i*t/5;z=6*(i)+t*i/r;x.fillStyle="#fff";x.fillRect(1e3+C(z*S(t/1e3))*r,500+S(z)*r,5,5)}

Jan 2 2018 5:24 AM UTC

}// 136/140

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travisdoesmath

remix of d/5191 by u/travisdoesmath

function u(t) {

a=256;
for(i=1;i<1024;i++) {
  x.fillStyle = R(12*t%a,12*t%a,16*t%a)
  x.fillRect(((60*t ^ i)%1024)+448, 28+i, 1, 1)
}

Jan 2 2018 3:20 AM UTC

}// 118/140

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u/donbright

oooh, def one of my favorite sierpinski - ish...
u/quuxman

such wow

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donbright

remix of d/3697 by u/Citiral

function u(t) {

w=1920;for(c.width=i=w;i-=10;)for(j=w;j-=10;){
d=(i*i+S(3.14*(i/w))*j*j)/frame
o=d%9
x.fillRect(i,j,o,o)}

Jan 2 2018 3:15 AM UTC

}// 105/140

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u/joeytwiddle

I was about to comment "donbright would like this one" but then suddenly ... !
u/magna

Wow!
u/Xen

one of my new fav's, love this!

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travisdoesmath

function u(t) {

a=256;b=8
for(i=1;i<128;i++) {
  x.fillStyle = R(60*t%a,120*t%a,180*t%a)
  x.fillRect(((60*t^i)%128)*b+448, 28+i*b, b, b)
}

Jan 2 2018 2:35 AM UTC

}// 124/140

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u/nickd3000

This is really cool, nice magic to find the x Coordinate
u/Xen

love it

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quuxman

function u(t) {

P=q=>(S((t|0)*q*99)+1)*1e3%2e3
for(j=20;j--;x.fillStyle=R(P(j),P(j+1),0))for(i=15;i--;)x.fillRect(S(i)*(r=(t%1)*400)+P(j),C(i)*r+P(j+1),4,4)

Jan 1 2018 11:02 AM UTC

}// 140/140

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2017++ and the fireworks burst through the crucible of byte reduction

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crimbles

function u(t) {

t||x.translate(980,540)
x.fillStyle=R(0,0,0,.1);
for(i=0;i<100;i++){
x.fillRect(i*C(t*0.5)*50,i*S(C(t*0.05)),50,4)}
x.rotate(C(t*0.02))

Jan 1 2018 9:47 AM UTC

}// 135/140

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doof

remix of d/5072 by u/doof

function u(t) {

with(x)rotate(1/(t||translate(n=960,540))/99),drawImage(c,-957,-537,1914,1074),fillStyle=`hsl(${t*90},50%,50%)`,fillRect(-n,S(t)*n,n+n,t&63)

Jan 1 2018 4:59 AM UTC

}// 140/140

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u/donbright

hell yes. great

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quuxman

remix of d/4911 by u/wclang

function u(t) {

A=(a,b)=>{for(i=w;i-=8;x.beginPath())x.arc(a%w,b%(w/2),i,0,7),x.stroke()}
c.width=w=808
A(a=s=9*t,a)
A(a=w-s%w,a)
A(t*2,s)

Dec 31 2017 10:50 AM UTC

}// 122/140

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fair amount of bytes left to go nuts :)

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function u(t) {

var n=1920,e=255,w=_=>[...Array(_).keys()].map(C);w(n).map(i=>{x.fillStyle=R(T(t/i)*e,e*i,e-S(t*i)*e);x.fillRect(S(t*i)*n,i*n,9,t/i)})

Dec 31 2017 8:36 AM UTC

}// 135/140

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wclang

function u(t) {

a=900;c.width=a;for(i=0;i<a;i=i+8){x.beginPath();x.arc(8*t,a/3,i,0,a);x.stroke();x.beginPath();x.moveTo(i,0);x.lineTo(i,a);x.stroke();}

Dec 31 2017 12:44 AM UTC

}// 135/140

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Moire patterns

u/quuxman

nice, remix d/4950

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