Displaying multiple markers on Google Maps in iOS

I'm trying to display few markers with settings which I get from remote JSON and local SQLite database. I have marker's name and snippet stored inside JSON and latitude with longitude which are inside the sqlite database. Unfortunately only one marker appears on the map. Should I create another array for markers? How to display markers with loop? Here is the code which display one pin.

import UIKit 
var camera = GMSCameraPosition.cameraWithLatitude(53.42854, longitude:14.55281, zoom: 13) 
var mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera)

class MapViewController: UIViewController
{

override func viewDidLoad()
{
    super.viewDidLoad()
    displayMarkers()
}

func displayMarkers() -> Void
{
    let jsonURL: NSURL = NSURL(string: "http://ift.tt/1wvZmXO")!
    var dataFromNetwork: NSData = NSData(contentsOfURL: jsonURL)!
    let json = JSON(data: dataFromNetwork) //println(json)
    var jsonSize = json.count
    mapView.myLocationEnabled = true

    var marker:GMSMarker = GMSMarker()

    for(var i = 0; i < jsonSize; i++)
    {
        let (resultSet, err) = SD.executeQuery("SELECT * FROM Clubs WHERE ID = ?", withArgs: [i])
        if(err != nil)
        {
            println("SQLite SELECT error!")
        }
        else
        {
            for row in resultSet
            {
                let name = row["Name"]?.asString()
                marker.title = name

                let latitude = row["Latitude"]?.asDouble()
                var markerLatitude: Double = latitude!

                let longitude = row["Longitude"]?.asDouble()
                var markerLongitude: Double = longitude!

                marker.position = CLLocationCoordinate2DMake(markerLatitude, markerLongitude)

                let partyName = json[i]["nazwa"].stringValue
                marker.snippet = partyName
                marker.appearAnimation = kGMSMarkerAnimationPop
            }
            marker.map = mapView
        }
    }
    self.view = mapView
}

override func didReceiveMemoryWarning()
{
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}
}