//Start the background thread.
Start the background thread.
// Start the background thread .
func (l Life) Start() {
	l.once.Do(func() {
		l.wg.Add(1)
		go l.run()
	})
}
func ( l Life ) Start ( ) { l . once . Do ( func ( ) { l . wg . Add ( 1 ) go l . run ( ) } ) }
Start the background thread.
Start the background thread .