Write a block in PL/SQL to print a dotted line in every 6th line

DECLARE
  CURSOR emp_cur IS
    SELECT first_name,last_name FROM employees
    WHERE ROWNUM < 15
    ORDER BY first_name;
  emp_fname employees.first_name%TYPE;
  emp_lname employees.last_name%TYPE;
  i number:=1;
BEGIN
  OPEN emp_cur;
  LOOP
    FETCH emp_cur INTO emp_fname,emp_lname;
    EXIT WHEN emp_cur%NOTFOUND OR emp_cur%NOTFOUND IS NULL;
    DBMS_OUTPUT.PUT_LINE(rpad(emp_cur%ROWCOUNT || '. ',10)|| emp_fname ||' '|| emp_lname);
    IF emp_cur%ROWCOUNT = 6*i THEN
       DBMS_OUTPUT.PUT_LINE('--------------------------------');
	   i:=i+1;
    END IF;
  END LOOP;
  CLOSE emp_cur;
END;
/