Can't terminate CREATE TRIGGER command

When I enter the following SQL command in SQL*Plus, SQL*Plus just keeps asking for the next line. No matter what I write Oracle doesn't execute the command.

CREATE OR REPLACE TRIGGER DriverTrig
  BEFORE INSERT ON Driver
    FOR EACH ROW
    BEGIN
      SELECT DriverSeq.NEXTVAL INTO :NEW.ID FROM dual;     END; Received on Fri Aug 27 1999 - 13:00:23 CDT