Changing depth to a negative number

Hi

I have a stack of 3 Mcs, 1, 2 and 3, one over the other, at the same layer.

I want to make an action, that makes the top level MCs, when clicked, to go under the other 2 MCs, and so on.

Is it possible? I tried to make it, but discovered that it’s not possible to define negative depth for a MC.

What can I do?