Shocks in VAR(2) form


I have a query regarding the specification of shocks in the Model.

Instead of AR(1) process for each of the three foreign variables in my model, I would like to specify VAR(2) path for my three foreign variables (see the below excerpt from Justiniano Presto (2010).

How do I specify this under the model block in dynare?
In the below example for bvar, dx and dy are written as AR(1) under the model block.

How can i write it as VAR(2)

Simply write the VAR in the model block. See the exogenous process in

Thank you Prof Pfeifer for the reference. This is very helpful.

Many Thanks