cat license.txtecho  -n "Do you want to continue ?  "set answer = 0while ( $answer == 0 )  set a = $<  if ( "$a" == "yes"|| "$a" == "YES" || "$a" == "Yes" ) set answer = yes  if ( "$a" == "no" || "$a" == "NO"  || "$a" == "No"  ) set answer = no  if ( $answer == 0 ) then    echo " "    echo -n "Please say YES or NO: "  endifendif ( $answer == no ) then   rm -f .license   echo " "   echo "Installation stopped."   echo " "else   echo " "   echo "ok, installation continues."   echo " "   touch .licenseendif