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My code is not working and can't find code file available for creating random color model please advise

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var randomFactLable: UILabel!

    let randomFactProvider = RandomFactProvider()
    let randomBackgroundColorProvider = RandomBackgroundColorProvider()  //error use of unresolved identifier 

    override func viewDidLoad() {
        // Do any additional setup after loading the view.

        randomFactLable.text = randomFactProvider.facts[0]

    @IBAction func showAnotherFunFactButton() {

        randomFactLable.text = randomFactProvider.randomFact()

        let randomColor = randomBackgroundColorProvider.randomFact()
        view.backgroundColor = randomColor  //this line is all white not color indicator



//I followed the video not sure why it not working I'm using Xcode 11.3.1