Delay for loop Help

[duchman]

I ve done simple dripping effect, but I need those drops to have some delay between their droping, lets say 2 sec..
Heres the code:

var nDrop:uint = 1;
var dripping:Drop = new Drop();

    function init(){
        setD();
    }
    function setD():void{
    addChild(dripping);
    
    dripping.ySpeed = 35 + Math.random() * 5;
    dripping.cacheAsBitmap = true;
    addEventListener(Event.ENTER_FRAME, drip, false, 0, true);
    
    }
    
function drip(event:Event):void {

    for (var i = 0; i < nDrop; i++) {

        dripping.y += dripping.ySpeed;

        if (dripping.y > 500 + Math.random() * 450) {
            dripping.x = Math.random() * 790;
            dripping.y = Math.random() * -1000;// Here, I ve moved startingY point to way off stage
                                               //to simulate delay..
        }
    }
}
init();

I cant get it right..help..
Thnx