JS1k: The JavaScript code golfing competition

_='W=a.widE,H=a.heigh`j=1;
 R(ranqm()Ffloor!N=11I=MaE.min(W,H)/N;
 GM=L)Z(F(6F(6d=2+F(5M(x,yJ)M^	i=g.,n$n<i;n++r=g.M[n];if(x>O@y>=t@x<s+d@y<t+dx-s,o=y-t;X=d-o,Y=y,X+sA,Y+t}}C^valO,d,dL	t=[]J$d<s;d	i$i<s;i++cell_C(dzi||d+i=OA?1:0J,it.push(cell!tP(g(setTimeout(P,100!qcument.onkeyqwn=
sO||winqw.evenkO.keyCodeJxJy,37A38A39140113zk@Mx`js.ctrlKey?Qx+dy:xQx`Qy<1=1UNsN-UN=N-<0<0xy!,G#89C";	s$s<N;s	t$t<N;t#"+3*(2++t)%2)+"8C",S*sI*SI);rgba(255,0,0,0.5)",B`BjBjB#000";d=;for$s<d;sM[s](!,C(2*x+x)/3,(2*y+y)/3,1zval@xB+6,yB+6IA2IA2!;g_G(N);PVVV();
functionEis.DStyle="var ),@(DRect(.prototype=
(	for(sdMaE.zkd=0(s){}
 U=N=N-ssy*R().drawx=y=r.dM.lengEt,++)return sx!)}$;@&&A-1B*SDc.fillEthI,SJ,dO=sPrunQ+=dU+>V(Z^,d_=new `,j,qdoz==';for(Y=0;$='zqj`_^VUQPOJIEDBA@$!	
'[Y++];)Z=_.split($),_=Z.join(Z.pop());eval(_)

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

var W = a.width;
var H = a.height;
//selection
var sx = 0;
var sy = 0;
var sd = 1;

function R(){return Math.random()}
function F(a){return Math.floor(a)}

var N = 11;

var S = Math.min(W,H)/N;

document.onkeydown = function(e) {
    e = e || window.event;
    k = e.keyCode;
    //evt.ctrlKey
    dx=0;
    dy=0;
    if (k == 37) {
	dx = -1; //left
    }
    if (k == 38) {
	dy = -1; //up
    }
    if (k == 39) {
	dx = +1; //right
    }
    if (k == 40) {
	dy = +1; //down
    }	
    if (k == 13) { 
	M(sx,sy,sd);
    }    
    if(!e.ctrlKey)
    {
	sx+=dx;
	sy+=dy;
    }
    else
    {
    	sd+=dx+dy;
    }

    
    if(sd<1) sd=1;
    if(sx+sd>N)sx=N-sd;
    if(sy+sd>N)sy=N-sd;
    if(sx<0)sx=0;
    if(sy<0)sy=0;
    
    if(sx+sd>=N) sd = N-sx
    if(sy+sd>=N) sd = N-sy
};


//////////////////////////////////
//
//	GAME
//


function G(n){
	this.M = L(n);
}

G.prototype.draw = function()
{
	c.fillStyle="#89C";
	
	for(var i=0; i<N; i++)
	{
		for(var j=0; j<N; j++)
		{
			c.fillStyle="#"+(3*(2+(i+j)%2))+"8C";
			c.fillRect(S*i, S*j, S, S);
		}
	}
	
	c.fillStyle="rgba(255,0,0,0.5)";
	c.fillRect(sx*S, sy*S, sd*S, sd*S);

	c.fillStyle="#000";
	
	var n = this.M.length;
	for(var i=0; i<n; i++)
	{
		this.M[i].draw();
	}
}

function Z()
{
	x= F(R()*6)
	y= F(R()*6);
	d = 2+F(R()*5);
	M(x,y,d);
}

function M(sx, sy, sd){
        var n = g.M.length;
	for(var i=0; i<n; i++)
	{
		var el = g.M[i];
		if(el.x>=sx && el.y>=sy && el.x<sx+sd && el.y<sy+sd)
		{
			var xx = el.x-sx;
			var yy = el.y-sy;
			X = sd-yy;
			Y = xx;
			el.x = X+sx-1;
			el.y = Y+sy;
		}
	}
}

//////////////////////////////////
//
//	CELL
//

function C(v, x, y)
{
	this.val = v;
	this.x = x;
	this.y = y;
	this.dx=x;
	this.dy=y;
}

C.prototype.draw = function()
{
	this.dx = (2*this.dx+this.x)/3;
	this.dy = (2*this.dy+this.y)/3;
	if(this.val==1) c.fillRect(this.dx*S+6, this.dy*S+6, S-12, S-12);
}


//////////////////////////////////
//
//	MATRIX ETC
//

function L(n)
{
	var m = [];
	for(var i=0; i<n; i++)
	{
		for(var j=0; j<n; j++)
		{
		        var v = (i==j || i+j==n-1)?1:0;
			cell = new C(v, i, j);
			m.push(cell);
		}
	}
	return m;
}

function run()
{
	g.draw();
	setTimeout(run,100);
}

var g = new G(N);
run();
Z();Z();Z();