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import UIKit
import Foundation
var helloWorldTimer: Timer?
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad
}
var helloWorldTimer = Timer.scheduledTimer(timeInterval: 60.0, target: self, selector:(Selector(("sayHello"))), userInfo: nil, repeats: true)
func sayHello() {
print("hello World")
}