how can i create a macro that selects, lets say column h, inserts two rows
every two rows.

column h

row 6 254
row 7 -254
row 8 450
row 9 -450

final result should be:

column h

row 6 254
row 7 -254
inserted row
inserted row
row 8 450
row 9 -450
inserted row
inserted row

and so on,

thanks a lot for your help