eturn {number} 		a random number
			 */
			randMinMax = function(min, max, round) {
				var val = min + (Math.random() * (max - min));
				
				if(round) val = Math.round(val);
				
				return val;
			};
			
			
			/*
			 * our main loop
			 */
			var loop = function() {
				
				var candidates = [];
				
				//clear the tree
				myTree.clear();
				ctx.clearRect(0, 0, 640, 480);
				
				//update myObjects and insert them into the tree again
				for(var i=0;i<myObjects.length;i=i+1) 