loop {cities::*}:

  message "%loop-value%" # #! This is the city that is being looped
  set {_CurrentCity} to "%loop-value%" # #! This would be the current city being looped (no need for a number as it is currently the only one)

  loop {parks.%{_CurrentCity}%::*}: # #! This would loop all parks in the current city being looped

    message "%loop-value-1%: %loop-value-2%" # #! Current city (top-most loop) and current park (2nd loop would be loop-value-2)
    set {_CurrentPark} to "%loop-value-2%"

    loop {trees.%{_CurrentCity}%.%{_CurrentPark}%::*}: # #! This loops all trees, inside the park thats being looped, inside the looped city

      message "%loop-value-1%: %loop-value-2%: %loop-value-3%" # #! City (loop-value-1), Park (loop-value-2, Tree (loop-value-3)
      set {_CurrentTree} to "%loop-value-3%"

      loop {branches.%{_CurrentCity}%.%{_CurrentPark}%.%{_CurrentTree}%::*}:

        message "%loop-value-1%: %loop-value-2%: %loop-value-3%: %loop-value-4%" # #! City (loop-value-1), Park (loop-value-2, Tree (loop-value-3), Branch (loop-value-4)
        set {_CurrentBranch} to "%loop-value-4%"

        loop {apples.%{_CurrentCity}%.%{_CurrentPark}%.%{_CurrentTree}%.%{_CurrentBranch}%::*}:

          message "%loop-value-1%: %loop-value-2%: %loop-value-3%: %loop-value-4%: %loop-value-5%" # #! City (loop-value-1), Park (loop-value-2, Tree (loop-value-3), Branch (loop-value-4), and Apple (loop-value-5)
          set {_CurrentBranch} to "%loop-value-5%"