Hey @zahra_ghorbani, maybe you can edit your script so the rectangles are made before the kangaroo simulation so you integrate some form of snapping like what Daniel Piker made here?
Just an idea! Perhaps look into the option for aligning faces with Kangaroo, if it applies. Also, you could recategorize your topic tag(s) to include ‘kangaroo’ not just ‘Grasshopper - windows’ - this way you might summon the right enthusiasts.
Best