Referring to last question.. Is there an easier/more efficient way of doing this?

Trying to insert a part and have it snap to a selected face/Normal/Surface AKA "front,back,top,bottom"

Ive gotten it to work with some scabby code but if someone could let me know if there is an easier way that would be great

Mouse = game.Players.LocalPlayer:GetMouse()

function click()
    if script.Parent.Parent.Value.Value == false then

    Mouse.Move:Connect(move)

    script.Parent.Parent.Value.Value = true 
    script.Parent.Parent.Parent.BF.Visible = true
    script.Parent.BackgroundColor3 = Color3.new(0,0,0)
    else
        script.Parent.Parent.Value.Value = false
        script.Parent.Parent.Parent.BF.Visible = false
        script.Parent.BackgroundColor3 = Color3.new(0,0,0)

    end
end

function move()
if script.Parent.Parent.Value.Value == true then
print(Mouse.TargetSurface)



end


end


function mouseClick()
    if script.Parent.Parent.Value.Value == true then
    local Target = Mouse.Target
    print(Target.Position)
    script.Parent.Parent.SurfaceSelection.Adornee = Target
    script.Parent.Parent.SurfaceSelection.TargetSurface = Mouse.TargetSurface

    if Mouse.TargetSurface == Enum.NormalId.Front then -- these are my attempts
        local a = Instance.new("Part")

    a.Parent = game.Workspace
    a.Size = Vector3.new(4,4,4)
    a.CFrame = CFrame.new(-4,0,0):toWorldSpace(Target.CFrame)
    end

        if Mouse.TargetSurface == Enum.NormalId.Back then
        local a = Instance.new("Part")

    a.Parent = game.Workspace
    a.Size = Vector3.new(4,4,4)
    a.CFrame = CFrame.new(4,0,0):toWorldSpace(Target.CFrame)
    end


    end

end

Mouse.Button1Down:Connect(mouseClick)
script.Parent.MouseButton1Click:Connect(click)