Ansible - Looping vars_prompt question to create LTM pool

I'm trying to create a playbook to create a pool, and the variables of the pool configuration are provided by the user.

I have it working configuring just one pool member, but in most cases, there are multiple pool members. Any ideas on how I could loop the below question, and exit the loop once the user has entered all of the pool members?

   - name: "pool_member"
      prompt: "Enter the pool member IP and port [enter as IP:Port]"
      private: no
    - name: "pool_address"
      prompt: "Enter the pool member address"

Also, once all of the user's input has been collected, how would you then pass it into the implementation? Here's what I have so far for that section:

 - name: Implementation
    bigip_command:
      server: "{{ inventory_hostname }}"
      user: "{{ remote_username }}"
      password: "{{ remote_passwd }}"
      commands:
        - "tmsh create ltm pool {{ pool_name }} { load-balancing-mode {{ pool_lb_mode }} members add { {{ pool_member }} { address {{ pool_address }} } } monitor {{ pool_monitor }} }"
      validate_certs: no
    delegate_to: localhost