syntax error when declaring variables in a pl/sql procedure

CREATE OR REPLACE PROCEDURE MRCS.pro_xxx_test1 (cats out sys_refcursor)
IS
spoon number;
balls varchar2(3);
BEGIN
 open cats for select * from dual;
end;
/

Remove the "DECLARE". Not needed in a function / procedure declaration

Declare local variable between IS and BEGIN block for procedure and function

CREATE OR REPLACE PROCEDURE MRCS.pro_xxx_test1 (cats out sys_refcursor)
IS
    spoon number;
    balls varchar2(3);
BEGIN

    open cats for select * from dual;

end;

/