time for timer calc
let minutes:Int = Int( Float(elapsedTime) / 60.0 )
let hours:Int = Int( Float(elapsedTime) / 3600.0 )
let sec:Int = Int( fmodf(Float(elapsedTime), 60.0))
var minuteStr = "\(minutes)"
if minutes < 10 {
minuteStr = "0\(minutes)"
}
var hourStr = "\(hours)"
if hours < 10 {
hourStr = "0\(hours)"
}
var secStr = "\(sec)"
if sec < 10 {
secStr = "0\(sec)"
}
timeLabel.text = "\(hourStr):\(minuteStr):\(secStr)"