Dropping all user tables/sequences in Oracle

BEGIN 
 
  --Bye Sequences! 
  FOR i IN(SELECT us.sequence_name 
              FROM USER_SEQUENCES us) LOOP 
    EXECUTE IMMEDIATE 'drop sequence '|| i.sequence_name ||''; 
  END LOOP; 
 
  --Bye Tables! 
  FOR i IN(SELECT ut.table_name 
              FROM USER_TABLES ut) LOOP 
    EXECUTE IMMEDIATE 'drop table '|| i.table_name ||' CASCADE CONSTRAINTS '; 
  END LOOP; 
 
END; 

--bye object

begin
FOR i IN(SELECT ut.object_name,ut.object_type
              FROM user_objects ut where ut.object_type in  ('PROCEDURE','PACKAGE','PACKAGE BODY','VIEW','FUNCTION') ) LOOP
    EXECUTE IMMEDIATE 'drop '||i.object_type||' '|| i.object_name ;
   
  END LOOP;

end;