// JavaScript Document
twinkleCount=0;

var layers=Array();
layers[0]='layer1';
layers[1]='layer2';
layers[2]='layer3';
layers[3]='layer4';
layers[4]='layer5';
layers[5]='layer6';
layers[6]='layer7';

function rotateCity(){
	
	for(i=0;i<7;i++){
		turnOff=document.getElementById(layers[i]).style;
		turnOff.visibility='hidden';
	}
	if(twinkleCount<7){
		turnOn=document.getElementById(layers[twinkleCount]).style;
		turnOn.visibility='visible';
		twinkleCount++;
		if(twinkleCount==7){
			twinkleCount=0;
		}
	}
	setTimeout('rotateCity()',125);	
}