- hosts: all
   gather_facts: yes

   tasks:
   - block:

       - debug: msg="this is the first task"
       - fail:
         when: inventory_hostname == "l2"
       - debug: msg="only l1 and l3 should see me"

     rescue:
       - debug: msg="this is the rescue"
       - command: /bin/false

       - debug: msg="no host should see this run"

     always:
       - debug: msg="this is the always block, it will always be seen"
     when: foo|default('') != "some value"
     tags:
       - foo
       - bar

   - debug: msg="you should only see l1 and l3 run this"