Would I move my if statements that are under the flipCoin() function to their own files? or keep in view controller

import UIKit
import GameKit

class ViewController: UIViewController {

    @IBOutlet weak var headsOrTails: UILabel!
    @IBOutlet weak var ifHeads: UILabel!
    @IBOutlet weak var ifTails: UILabel!
    @IBOutlet weak var flipButton: UIButton!
    var backgroundColor = RandomColor()
    var coin = CoinFlip()
    var headsIndex = 0
    var tailsIndex = 0

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
        headsOrTails.text = "Press Flip!"
        ifHeads.text = "Number of heads: \(headsIndex)"
        ifTails.text = "Number of tails: \(tailsIndex)"
    }

    @IBAction func flipCoin() {
        // Random Background Color
        let randomBackgroundColor = backgroundColor.randomNumber()
        view.backgroundColor = randomBackgroundColor

        // Flip Button Color
        flipButton.tintColor = randomBackgroundColor

        // When the button is pressed, the function pics a random number to
        // display either heads or tails and then increments the correct label
        // to keep a running total of how many times heads or tails is flipped.
        let someCoin = coin.coinFlip()

        if someCoin == "Heads" {
            headsOrTails.text = "Heads"
            headsIndex += 1
            ifHeads.text = "Number of heads: \(headsIndex)"
        }

        if someCoin == "Tails" {
            headsOrTails.text = "Tails"
            tailsIndex += 1
            ifTails.text = "Number of heads: \(tailsIndex)"
        }
    }
}