//circles have a beginning x,y as well as a destination x,y. The -1 are temporary
function Circle(x,y,r) { 	 	
	this.x=x;
	this.y=y;
	this.r=r;
	this.destX=-1;
	this.destY=-1;
	this.alpha=0;
	this.vx=(Math.random() * 5) - 2.5;
	this.vy=(Math.random() * 5) - 2.5;
	this.color="#000000";
	this.destColor="#000000";
	this.colorFade=false;
}