code: def move(self, delta):
          
          pos = self.pos
          self.pos = (pos[0]+delta[0], pos[1]+delta[1], pos[2]+delta[0], pos[3]+delta[1])
  
          # Move all nodes
          for age in self.nodes:
              for node in age:
                  node.move(delta)
docs: Move the tree.
  
          Args:
              delta (tupel): The adjustment of the position.