-- Vector3 and Position --


local part = game.Workspace.PositionPart

part.Size = Vector3.new(8, 8, 8)
part.Position = Vector3.new(10, 10, 10)

part.Position = part.Position + Vector3.new(5, 5, 5) -- (15, 15, 15)
part.Position += Vector3.new(5, 5, 5) --also works

