anchor.diff:  
               if (nspawn > 0) then
   
  -                ! 5. If H_ij is positive, then the spawned walker is of opposite
  +                ! 4. If H_ij is positive, then the spawned walker is of opposite
                   ! sign to the parent, otherwise the spawned walkers if of the same
                   ! sign as the parent.
                   if (hmatel_ki*hmatel_jk > 0.0_p) then
  
positive.code: !TO DO:
  ! tau finder
  ! death step
  ! spawning step
  ! calculating P__, P_o, Po_
  
  use const
  
  use proc_pointers
  
  implicit none
  
  ! 1)
  !      ___
  !     / _ \
  !    | / \ |
  !     \\.//
  
  ! 2)
  !      __   __ 
  !    ./  \./  \.
  !
  ! 3)
  !      __
  !    ./  \.
  !     \__/
  !
  ! 4)
  !     _
  !    / \
  !    \./____.
  !
  ! 5)
  !          _
  !         / \
  !    .____\./
  
negative.code: 
  
      subroutine fs_spawner(cdet, parent_sign, nspawn, connection)
          ! Attempt to spawn a new particle on a daughter or granddaughter determinant according to
          ! the fsfciqmc algorithm for a given system
          !
          ! In:
  