Square lights moving across the sky

Went out to feed the dogs and saw a series of square lights slowly moving across the sky from west to east or southwest to northeast.  Could not see any craft just about 10 square window shaped lights that were all next to each other in a horizontal line (single craft) moving across the sky.  I walked about 20 feet while looking at it thinking it could be a glare off something . It Did not change speed or direction.  Dissappeared behind some trees.  Was a couple miles away from me over Chicago Park, Colfax area.  Checking my security camera when I get home to see if it caught anything