public IEnumerator WaitBeforeDestroy()
    {
        dropExplosionStatus = true;
        yield return(new WaitForSeconds(0.25f)); // Wait until player sees drops stand together.

        if (explosionsList.Count > 0)
        {
            Drop.listUpdateCount = 0;
            DestroyExplosionList(); // Destroys drops if explosions list is not empty.
        }
        else if (playerInput)       // player input will be 'true' if only player call SwapDrops() function. And it will be 'false' while drops are falling.
        {                           // Sets drop old position and reset some variables if there are no explosions.
            TouchStartDrop.BackToOldPosition();
            TouchEndDrop.BackToOldPosition();
            Drop.listUpdateCount = 0;
        }
        dropExplosionStatus = false;
    }