I want to modify breadcrumbs

Hi all

please help me modify my code to give 3 breadcrumbs as I have achieved to give 3 breadcrumbs but on clicking on 2nd I'm coming back to 2nd but clicking on 1st I'm not able to come back to 1st.

I attached my code where there are 3 rule inputs , in which showsubmodule and show pdf is boolean and selection is list of number

{
  a!localVariables(
    local!currentNodeId: if(
      ri!showSubModule = true,
      if(ri!showPDF, 3, 2),
      1
    ),
    local!nodes: a!forEach(
      items: enumerate(local!currentNodeId) + 1,
      expression: choose(
        fv!item,
        a!map(name: "Knowledge Base", identifier: 1),
        a!map(name: "Sub Modules", identifier: 2),
        a!map(name: "Show PDF", identifier: 3)
      )
    ),
    a!cardLayout(
      contents: {
        a!richTextDisplayField(
          labelPosition: "COLLAPSED",
          value: {
            a!forEach(
              items: local!nodes,
              expression: if(
                fv!isLast,
                a!richTextItem(text: fv!item.name, style: "STRONG"),
                {
                  a!richTextItem(
                    text: fv!item.name,
                    link: a!dynamicLink(
                      value: fv!item.identifier,
                      saveInto: {
                        a!save(ri!showPDF,false),
                        a!save(ri!selection, null),
                      }
                    ),
                    linkStyle: "STANDALONE"
                  ),
                  a!richTextItem(text: "  /  ", color: "SECONDARY")
                }
              )
            )
          }
        )
      },
      showBorder: false
    )
  )
}

Help me achieve this

thankyou!

Stefan Helzle Mike Schmitt