docs: def draw_dot(self, pos, color):
          """
          Draw one single dot with the given color on the screen.
  
          :param pos: Position of the dot
          :param color: COlor for the dot
          :type pos: tuple
          :type color: tuple
          """
          if 0 <= pos[0] < self.width and 0 <= pos[1] < self.height:
              self.matrix[pos[0]][pos[1]] = color