iOS count down clock swift code

[wsmoore]

I need help on what to do here . I have a code that runs one clock that count downs from 10 sec. 0, but I need three more clocks just like it that runs individually when press start button just like hockey penalty clocks. I don't want to copy and past codes all day. I know there's got be better way to code then what I am doing. Any ideas? I am new at Xcode and first time posting here.
Thank you
woo

import UIKit
class ViewController: UIViewController {

     @IBOutlet weak var Clock1L: UILabel!

    var seconds = 10

    var timer = Timer()

    var timerIsOn = false

      @IBAction func startButton1(_ sender: AnyObject) {

        if timerIsOn == false {

        timer = Timer.scheduledTimer(timeInterval: 1.0, target: self,selector:#selector(ViewController.updateTimer), userInfo: nil, repeats: true)

          timerIsOn = true

    }

}

    @IBAction func stopButton1(_ sender: AnyObject) {

        timer.invalidate()

      Clock1L.text = "\(seconds)"

        timerIsOn = false

    }
 
    @IBAction func resetButton1(_ sender: AnyObject) {

        timer.invalidate()

        seconds = 10

        Clock1L.text = "\(seconds)"

        timerIsOn = false

    }

    func updateTimer() {

        seconds -= 1

        Clock1L.text = "\(seconds)"

        if seconds == 0 {

            timer.invalidate()

        }

    }


    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }


    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }


}