code: def get_branches(self):
          
          branches = []
          for age, level in enumerate(self.nodes):
              branches.append([])
              for n, node in enumerate(level):
                  if age == 0:
                      p_node = Node(self.pos[:2])
                  else:
                      p_node = self._get_node_parent(age-1, n)
                  branches[age].append(p_node.get_tuple() + node.get_tuple())
  
          return branches
docs: Get the tree branches as list.
  
          Returns:
              list: A 2d-list holding the grown branches coordinates as tupel for every age.
                  Example:
                  [
                  [(10, 40, 90, 30)],
                  [(90, 30, 100, 40), (90, 30, 300, 60)],
                  [(100, 40, 120, 70), (100, 40, 150, 90), ...],
                  ...
                  ]