How to stop animation state after some time (1 seconds)

I have this script part

     public void Fall()
     {
     if (IsDead || State == CharacterState.Running || State ==    CharacterState.RunningDouble) // HERE GOES THE CODE
         return;
     
     lastState = State;
     State = CharacterState.Falling;
     // If we are too high do something
     animation.CrossFade("Falling");
     
     }

I want to put: if the character is dead, or if the character is running for one second or if the character is runningdouble for 1 second. RETURN;

But if the character has runned for 1 second, or runneddouble for 1 second, continue with animation.CrossFade("Falling");