How can i change sizes of Borders?

a = game.Workspace.NewName.Value



hitherebuddy = script.Parent.Parent.Parent.Parent.Parent.Parent
Player = game.Players.LocalPlayer
function buy()
local Part = hitherebuddy.Part
Part.BrickColor = BrickColor.new ("Really black")
script.Parent.Parent[a].BorderSizePixel = 0
print "blue border is now 0"
workspace.NewName.Value = script.Parent.Name
script.Parent.BorderSizePixel = 3
end
script.Parent.MouseButton1Down:connect(buy)

a = game.Workspace.NewName.Value



hitherebuddy = script.Parent.Parent.Parent.Parent.Parent.Parent
Player = game.Players.LocalPlayer
function buy()
local Part = hitherebuddy.Part
Part.BrickColor = BrickColor.new ("Really blue")
script.Parent.Parent[a].BorderSizePixel = 0
print "black border is now 0"
workspace.NewName.Value = script.Parent.Name
script.Parent.BorderSizePixel = 3
end
script.Parent.MouseButton1Down:connect(buy)

When the black square is pressed the blue square looses it's border (border is set to 0) and NewName.Value becomes "Black" However when the blue square is pressed the black square does not loose it's border but the Value of NewName does become "Blue" I do not know why this happens and i need help.