Dynamic Block with stretch and array action

[torpass]

Hello everyone, 

I'm on AutoCAD, trying to create a simple "grid" in section, that is a dynamic block, and that the base can be stretched and the top can be arrayed, everything in a single grip. The problem is that I can't figure out how to get the array object be in pair with the stretched rectangle object, because I need to set the value in millimetres that I will insert on the grip. Is it possible to do that? 

Here's the dwg, and a screenshot of an example of how the block should behave.

Thanks in advance

[ed57gmc · Accepted solution]

How about this version. I added a second polyline with a move action chained to the stretch action. I also changed the stretch to an increment action. No need to specify dims. Just drag how many elements to array.

[satoshiq]

I did not see you set the chain action to yes?

[satoshiq]

I thought I coppy all of your action, but I don't know how it just not work.