How to create a kiosk mode App for Mac OS using swift 4 and cocoa?

Hi there, I am a fresher apple developer. I am developing a software for eduction field, so that i need a kiosk mode in my application for restricting the students within the application only.

I am trying to do like this:

func KioskMode(){
        let presOptions: NSApplication.PresentationOptions = [
             .hideDock
           // .autoHideMenuBar,           // Menu Bar appears when moused to.
           // .disableAppleMenu,          // All Apple menu items are disabled.
           // .disableProcessSwitching,      // Cmd+Tab UI is disabled. All Exposé functionality is also disabled.
           // .disableForceQuit,             // Cmd+Opt+Esc panel is disabled.
           // .disableSessionTermination,    // PowerKey panel and Restart/Shut Down/Log Out are disabled.
           // .disableHideApplication,       // Application "Hide" menu item is disabled.
          //  .autoHideToolbar,
          //  .fullScreen
        ]
        let optionsDictionary = [NSView.FullScreenModeOptionKey.fullScreenModeApplicationPresentationOptions: presOptions]
        ExamFullPage.contentView?.enterFullScreenMode(NSScreen.main!, withOptions: optionsDictionary)
    }
    
    @IBAction func EnterKioskByBtn(_ sender: Any) {
        KioskMode()
    }

It is working but the problem is, it is never closing. I want to close the app after some time interval. When the timer stops the app will close autometically or when i press a button it will disable all kiosk activities and bring it back to the normal mode.

Can anybody help mo to find the solution.