How to make a unit accrue points every second?

Question

Unity

Please help to realize the receipt of bonuses every second. That is, when buying an improvement, it is required that every second score+1. I hope I explained well.

Answer 1

The simplest and best option: coroutines
More difficult, but more elegant: create a separate thread

Answer 2

There is such a function as WaitForSeconds, you can call it in an asynchronous function (that is, from a function like async void fun () ).
For example
async void AddBall()
{
while(needAddBall)
{
Ball++;
await new WaitForSeconds(1);
}
}
It will be executed, as it were, in parallel with the main thread of the game, that is, it will not interfere with it.

Answer 3

Without asynchrony, riveted a "sketch"

StartCoroutine(Метод());

void IEnumerator Метод()
{
    yield return new WaitForSeconds(1);
}

Answer 4

If the game is realtime, then check in FixedUpdate, if it's a milker, then simply by the formula.