Trigger Compilation Error

Having some trouble trying to figure out this compilation error, can anyone help?

CREATE OR REPLACE TRIGGER match_gender_check
BEFORE INSERT OR UPDATE ON matches
FOR EACH ROW
BEGIN
DECLARE
homegender VARCHAR(1);
oppgender VARCHAR(1);

BEGIN
SELECT h.teamgender INTO homegender FROM hometeams h WHERE :new.hometeam = REF(h);
SELECT o.teamgender INTO oppgender FROM opponentteams o WHERE :new.opponent = REF(o);
END


IF(homegender != oppgender) THEN
RAISE_APPLICATION_ERROR(-20012, 'Teams Of Opposite Gender Cannot Play Against Each Other');
END;
/

Thanks!

Never mind i got it. Here's the corrected version in case some lost fool is searching for it in future:

CREATE OR REPLACE TRIGGER match_gender_check
BEFORE INSERT OR UPDATE ON matches
FOR EACH ROW
DECLARE
homegender VARCHAR(1);
oppgender VARCHAR(1);

BEGIN
SELECT h.teamgender INTO homegender FROM hometeams h WHERE :new.hometeam = REF(h);
SELECT o.teamgender INTO oppgender FROM opponentteams o WHERE :new.opponent = REF(o);


IF(homegender != oppgender) THEN
RAISE_APPLICATION_ERROR(-20012, 'Boys Are Better Than Girls. Its Just Not Fair.');
END IF;
END;