text: class PxlVector():
      def __init__(self, x, y):
          self.x = x
          self.y = y
  
      def __add__(self, other):
          return PxlVector(self.x + other.x, self.y + other.y)
      
      def __sub__(self, other):
          return PxlVector(self.x - other.x, self.y - other.y)
  
      def __repr__(self):
          return self.__str__()
  
      def __str__(self):
          return "PxlVector(x={0}, y={1})".format(self.x, self.y)
  