Create an Oracle PL/SQL package

How to create a package, with the name PACK1, with one function called F1

CREATE OR REPLACE PACKAGE PACK1 IS
 
	FUNCTION F1 RETURN BOOLEAN;
 
END PACK1;
 
CREATE OR REPLACE PACKAGE BODY PACK1 IS
 
	FUNCTION F1 RETURN BOOLEAN IS
 
	BEGIN
		RETURN TRUE;
	END F1;
 
END PACK1;