Script to Create deadlines

[atarabotto]

tables, there are 4

Where PN register Bills active, passive and payments

Details payments (payment method, direct remittance, bank transfer 30 days from invoice date) and the data to create the deadlines (bank 30 days I will have a field "30" that high on the invoice date)

Master (to match the mode of payment to any customer or supplier)

and Deadlines

 

I would like to insert a bill, and depending on the payment methods, create their respective deadlines. each due date a record, bank transfer 30/60 I will create 2 records in deadlines, first 30 days higher than invoice date, the secon 60 days after.

how can I create the script? thanx