JS1k: The JavaScript code golfing competition

k=350;x=[];y=[];r=[];s=[];m=Math;d=document.getElementById("c");c=d.getContext("2d");d.width=k;d.height=k;function dist(a,b,e,f){return m.sqrt((a-e)*(a-e)+(b-f)*(b-f))}function ok(a){if(dist(x[a],y[a],k/2,k/2)>k/2-r[a])return 0;for(j=0;++j<a;)if(dist(x[a],y[a],x[j],y[j])<r[a]+r[j])return 0;return 1}for(i=0;++i<400;){r[i]=1;s[i]=m.random()*9+3;do{x[i]=m.random()*k;y[i]=m.random()*k}while(!ok(i));for(;ok(i);)r[i]++}
onmousemove=function(a){c.clearRect(0,0,k,k);for(j=0;++j<i;){c.beginPath();c.moveTo(x[j]+r[j],y[j]);for(o=0;o<6;o+=6/s[j])c.lineTo(x[j]+r[j]*m.cos(o),y[j]+r[j]*m.sin(o));c.lineTo(x[j]+r[j],y[j]);c.fillStyle=dist(a.pageX,a.pageY,x[j],y[j])<50?"#a9ffa9":"#a9a9ff";c.fill();c.stroke()}};

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k = 350;
x = [];
y = [];
r = [];
s = [];
m = Math;
d = document.getElementById("c");
c = d.getContext("2d");

d.width = k;
d.height = k;

function dist(x1, y1, x2, y2) {
	return m.sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2))
}

function ok(i) {
	if (dist(x[i], y[i], k/2, k/2) > k/2-r[i]) return 0;
	for (j = 0; ++j < i;) if (dist(x[i], y[i], x[j], y[j]) < r[i]+r[j]) return 0;
	return 1
}

for (i = 0; ++i < 400;) {
	r[i] = 1;
	s[i] = m.random()*9+3;
	
	do {
		x[i] = m.random()*k;
		y[i] = m.random()*k;
	} while (!ok(i));
	
	while (ok(i)) r[i]++;
}

onmousemove = function(e) {
	c.clearRect(0,0,k,k);
	
	for (j = 0; ++j < i;) {
	    c.beginPath();
	    
		c.moveTo(x[j]+r[j], y[j]);
		
		for (o = 0; o < 6; o+=6/s[j]) c.lineTo(x[j]+r[j]*m.cos(o), y[j]+r[j]*m.sin(o));
		
		c.lineTo(x[j]+r[j], y[j]);
		
		c.fillStyle = dist(e.pageX, e.pageY, x[j], y[j]) < 50 ? "#a9ffa9" : "#a9a9ff";
		
		c.fill();
		c.stroke();
	}
}