How to go back to the mainviewController with animation. I can do without animation.

[KDLNiranjan]

My code: func viewDidLoad() {

    let Screen = storyboard?.instantiateViewController(withIdentifier: "sampleVC") as! SampleViewController
    
    self.sampleVC = UINavigationController(rootViewController: Screen)

}

@IBAction func close(_ sender: Any) {

// slideMenuController()?.toggleLeft()

    self.slideMenuController()?.changeMainViewController(sampleVC, close: true)
 }

While closing the viewcontroller by pressing the back button it has to go the SampleViewController with animation(Like modal view or push view). How can i achieve it ? Please guide.