After Undelete Trigger

The code is below

trigger caserecundel on Case (after undelete) {
    if( trigger.isundelete){
    system.debug('Entering in the undelete*****');
    for(case c : trigger.new){
    system.debug('Entering in the Loop*****');
        c.After_Undelete__c = true;
        undelete c;
   }
  }
}