code: def pos_by_percent(self, x_percent, y_percent):
          
          x = round(x_percent * self.width)
          y = round(y_percent * self.height)
          return int(x), int(y)
docs: Finds a point inside the box that is exactly at the given percentage place.
  
          :param x_percent: how much percentage from left edge
          :param y_percent: how much percentage from top edge
          :return: A point inside the box