how to get opening and closing balance using MS Access Sql ?

Hello, I want to show the opening and closing balance which i mentioned in below image and i just want this type of output through ms access sql query.

i tried this below query but i didn't got the proper output as per my requirement.

select Edate,OB, Cr, Dr, (OB + Cr - Dr) as Bal, srno
from statement where srno = (select min(srno) from statement)
union all
select curr.edate, (curr.OB + prev.Bal), curr.Cr, curr.Dr,
(curr.OB + prev.Bal + curr.Cr - curr.Dr) as Bal, curr.srno
from statement curr inner join statement prev on curr.srno = prev.srno + 1

so help me how to do this using sql query ?