repeating.txt

<event>
  <outcome interval="1" name="timer1" enabled="true">
    <action_group>
      <actions>
        <set_max_life>60</set_max_life>
        <spawn_mob>
          <mob>zombie:levelone</mob>
          <world>world</world>
          <amount>1</amount>
          <target>
            <around>
              <mob>player</mob>
                <x>16 to 32</x>
                <y>0</y>
                <z>16 to 32</z>
            </around>
          </target>
        </spawn_mob>
      </actions>
    </action_group>
  </outcome>
</event>