kotlin coroutines timer

fun main(){
    exampleAsyncAwait()
    println("main thread end")
}
suspend fun calculateHardThings(startNum: String){
    delay(1000)
    println(startNum)
}
fun exampleAsyncAwait() = runBlocking {
    val startTime = System.currentTimeMillis()
    var c1:Int=1;
    launch { while (c1<10){
        c1++;
        val deferred1 = async { calculateHardThings("tick") }
        val deferred2 = async { calculateHardThings("tok") }.await()
    } }

    println("end")//main code thread, does not wait for the timer which is in the BackGround
}

fun main()= runBlocking{

    var c1:Int=1;
    launch (Dispatchers.Default){ while (c1<10){
        c1++;
        val deferred1 = async { tic("tick") }
        val deferred2 = async { tic("tok") }.await()
    } }
    println("main thread end")
}
suspend fun tic(startNum: String){
    delay(1000)
    println(startNum)
}