Oracle PL/SQL insert, commit statement DECLARE error

Hello - I'm trying to write a simple PL/SQL statement to speed up inserting rows into a table.  I have a 5bil row table.  Below is my code and I keep getting DECLARE errors.  Any help appreciated!  Or if there is a better/faster way, please let me know.  thanks!

SQL> create or replace procedure AC_NOTE
  2  as
  3  DECLARE
  4  Col1 ACC_LOG_DTL_IX_OLD.ACCESS_INSTANT%TYPE;
  5  Col2 ACC_LOG_DTL_IX_OLD.PROCESS_ID%TYPE;
  6  Col3 ACC_LOG_DTL_IX_OLD.DATA_MNEMONIC_ID%TYPE;
  7  Col4 ACC_LOG_DTL_IX_OLD.STRING_VALUE%TYPE;
  8  Col5 ACC_LOG_DTL_IX_OLD.INTEGER_VALUE%TYPE;
  9  INSERT_COUNT NUMBER := 1;
 10  BEGIN
 11  CURSOR c1 IS select * from  ACC_LOG_DTL_IX_OLD where  DATA_MNEMONIC_ID = 'NOTE';
 12  FOR r1 IN c1 LOOP
 13  INSERT
 14  INTO ACC_LOG_DTL_IX
 15  (ACCESS_INSTANT,
 16       PROCESS_ID,
 17       DATA_MNEMONIC_ID,
 18       STRING_VALUE,
 19       INTEGER_VALUE)
 20  VALUES
 21  (r1.Col1, r1.Col2,r1.Col3,r1.Col4,r1.Col5);
 22  IF INSERT_COUNT = 1000 THEN
 23  COMMIT;
 24  INSERT_COUNT := 1;
 25  ELSE
 26  INSERT_COUNT := INSERT_COUNT + 1;
 27  END IF;
 28  END LOOP;
 29  COMMIT;
 30  END
 31  ;
 32  /

Warning: Procedure created with compilation errors.

Elapsed: 00:00:00.12


 show errors
Errors for PROCEDURE AC_NOTE:

LINE/COL ERROR
-------- -----------------------------------------------------------------
3/1      PLS-00103: Encountered the symbol "DECLARE" when expecting one of
         the following:
         begin function pragma procedure subtype type <an identifier>
         <a double-quoted delimited-identifier> current cursor delete
         exists prior external language
         The symbol "begin" was substituted for "DECLARE" to continue.

11/8     PLS-00103: Encountered the symbol "C1" when expecting one of the
         following:
         := . ( @ % ;