PingTimer.swift

guard let googleURL = URL(string: "https://www.google.com") else {
            fatalError("What went wrong?")
}
        
Timer.scheduledTimer(withTimeInterval: 0.5, repeats: true) { (_) in
            let task = URLSession.shared.dataTask(with: googleURL) { (data, response, error) in
                if error != nil {
                    // handle error
                    print(error.debugDescription);
                } else {
                    // we succeeded!
                    print(data.debugDescription);
                    print(response.debugDescription);
                }
            }
            task.resume();
}