unity IEnumerator 协同程序

IEnumerator Awake() {
yield return new WaitForSeconds(5.0F);
}

IEnumerator Do() {
print("Do now");
yield return new WaitForSeconds(2);
print("Do 2 seconds later");
}
void Awake() {
Do();
print("This is printed immediately");
}

IEnumerator Do() {
print("Do now");
yield return new WaitForSeconds(2);
print("Do 2 seconds later");
}
IEnumerator Awake() {
yield return StartCoroutine("Do");
print("Also after 2 seconds");
print("This is after the Do coroutine has finished execution");
}