Why this function don't work?
mouse.Button1Up:Connect(function()
if player.Team == game.Teams.Blue then
local part = Instance.new("Part")
part.Size = 2,2,2
part.Anchored = true
part.Material = "Wood"
part.BrickColor = BrickColor.new("Bright blue")
part.Position = mouse.Hit.Position
part.Parent = workspace
if part.Position.X < 266.6 then
part:Destroy()
elseif part.Position.X > 426.4 then
part:Destroy()
elseif part.Position.Z < -401.6 then
part:Destroy()
elseif part.Position.Z > -561.5 then
part:Destroy()
end
end)
I think the problem is in the parameters where you can put the part.

2 comments
on part.Size change it to Vector3.new() and put the 2,2,2 in there.
you need to use Vector3()