func JustSleep(wg *sync.WaitGroup){
    time.Sleep(time.Second*5)
    fmt.Println("Sleep finished")
    wg.Done()
}

func main(){
    var wg sync.WaitGroup
    wg.Add(5)
    for i := 0 ; i < 5 ; i++{
        go JustSleep(&wg)
    }
    wg.Wait()
    fmt.Println("Ending main process")
}