How to create a boundary around an array of circles

I`ve created an array of circles and want to create a rectangle boundary around the for a point attractor. would anyone plz guide me?

BoundingBox BBox

thx a lot.
I tried that. but it create a bounding box around each circle. any trick to create a one bounding box around all of the circles?

Right-click on the BBox text/icon and select Union. That makes the box surround everything. The default is “Per object” which puts a separate box around each piece of geometry.

This is just one of the many little quirks in GH that we all come to know and love.

thx a lot.
that was exactly what I wanted.