Patterned disks over southern california sky.

Observed one silver circular object in the sky above us.  The single disk separated into two equal sized disks, same size as the original.  All of this happening while moving north-west in a slow but constant speed.  The second circular disk was following the first closely in a straight line.  After passing some clouds, observed two smaller disks on the front left and front right of the first disk.  Still moving in a straight line heading north-west, again observed two smaller disks emerging from the second trailing circular object.  The two new smaller objects then moved to the back left and back right of the second trailing circular disk.  The position of the disks were like a convoy with the two large circular disks in the center and four smaller disks on the front and back.  The objects continued on their straight line flight towards north-northwest.  Until the objects could no longer be seen.
Witness indicates that the date of the event is approximate.  PD