JS1k: The JavaScript code golfing competition

f=[];j=200;n=k=p=q=O=0;w=a.width;h=a.height;Z={x:0,y:0};m=Math;o="globalCompositeOperation";for(y in c)c[y[0]+y[1]+(y[6]||"")]=c[y];function $(d,e){d=d||-2;e=e||2;return m.random()*(e-d)+d}function l(){requestAnimationFrame(l);c[o]="source-over";c.sa();c.globalAlpha=.1;c.tra(w/2,h/2);c.sc(1.009,1.009);c.ro(.007);c.tra(-w/2,-h/2);c.drawImage(a,0,0);c.ree();c.drawImage(a,0,0,w,h,$(),$(),w+$(),h+$());c[o]="xor";c.fillStyle="rgba(0,0,0,.01)";c.fic(0,0,w,h);c[o]="lighter";c.bea();for(i=0;i<j;i++)z=f[i],z.x+=z.vx=.2*(z.l.x-z.x),z.y+=z.vy=.2*(z.l.y-z.y),0<i&&c.li(z.x+$(-5,5),z.y+$(-5,5)),0==O%2&&c.strokeRect($(0,w),$(0,h),.6,.6);c.strokeStyle="hsla("+$(k,k+60)+", "+$(60,90)+"%,"+$(10,70)+"%,"+$(.3,.5)+")";c.st();O++}for(J=j;J--;)f[J]={l:J==j-1?Z:f[J+1]};function R(){c[o]="source-over";c.fillStyle="#000";c.fic(0,0,w,h);k=90*$();_=$(40,99);for(i=0;i<j;i++)z=f[i],_=0==n%2?_:$(100,150),z.x=w/2+m.cos(i/j*m.PI*_)*i*20,z.y=h/2+m.sin(i/j*m.PI*_)*i*20;n++}b.onmousemove=function(d){Z.x=d.pageX;Z.y=d.pageY};b.onclick=R;R();l()

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

f = [],
j = 200,
n = k = p = q = O = 0,
w = a.width,
h = a.height,
Z ={x:0,y:0},
m = Math,
o = 'globalCompositeOperation';

for(y in c)
	c[y[0]+y[1]+(y[6]||'')]=c[y];

function $( a, b ) {
	a = a||-2;
	b = b||2
	return m.random() * ( b - a ) + a;
}

function l() {
	requestAnimationFrame( l );

	c[o] = 'source-over';

	c.sa();// c.save();
	c.globalAlpha = .1;
	c.tra( w / 2, h / 2 ); // c.translate();
	c.sc( 1.009, 1.009 ); // c.scale();
	c.ro( 0.007 ); // c.rotate
	c.tra( -w / 2, -h / 2 ); // c.translate();
	c.drawImage(a, 0, 0);
	c.ree(); // c.restore()
	c.drawImage(a,0,0,w,h,$(),$(),w+$(),h+$());

	c[o] = 'xor';
	c.fillStyle = 'rgba(0,0,0,.01)';
	c.fic( 0, 0, w, h ); // c.fillRect();

	c[o] = 'lighter';
	c.bea(); // c.beginPath();
	for(i=0;i<j;i++){
		z=f[i];
		z.x += z.vx = ( z.l.x - z.x ) * .2;
		z.y += z.vy = ( z.l.y - z.y ) * .2;
		i > 0 && c.li( z.x + $(-5,5), z.y + $( -5, 5 ) );
		O % 2 == 0 && c.strokeRect( $(0, w), $(0, h), .6, .6);
	}
	c.strokeStyle = 'hsla(' + $(k, k+60) + ', ' + $( 60, 90 ) + '%,' + $( 9, 70 ) + '%,'+$(.3, .5)+')';
	c.st(); // c.stroke();
	O++;
}

J=j;
while(J--){
	f[J] = {
		l: J == j-1 ? Z : f[ J + 1 ]
	}
}

function R() {
	c[o] = 'source-over';
	c.fillStyle = '#000';
	c.fic( 0, 0, w, h );
	
	k = $()*90;
	_ = $(40,99);
	for(i=0;i<j;i++){
		z=f[i];
		_ = n % 2 == 0 ? _ :$(100,150);
		z.x = w / 2 + m.cos( i / j * m.PI * _ ) * i * 20;
		z.y = h / 2 + m.sin( i / j * m.PI * _ ) * i * 20;
	}
	n++;
}

b.onmousemove = function( e ) {
	Z.x = e.pageX;
	Z.y = e.pageY;
};

b.onclick = R;

R();
l();