How do I use a SelectionBox in my tool?

I'm trying to make a pickaxe, It wont work, The SelectionBox isn't even active for some reason. I need my pickaxe to highlight over the blocks/ores. I have the script but it won't work. Please, someone help, this is urgent!

repeat wait() until script.Parent:FindFirstChild("Stats")

local Stats = require(script.Parent.Stats)

local diddy = true

local Mouse

local Equipped = false

local MobileMode = false

local Active = false

script.Parent.IsMining.Changed:connect(function()
    workspace.CurrentCamera.SelectedItem.Mining.Value = script.Parent.IsMining.Value
end)
workspace.CurrentCamera.SelectedItem.Mining.Value = script.Parent.IsMining.Value

local function Activate()
    if not Active then
        script.Parent.Activation:FireServer(true)
    --  workspace.CurrentCamera.SelectedItem.Mining.Value = true
        Active = true
        while Active do
            if workspace.CurrentCamera.SelectedItem.Value ~= nil then
    --          workspace.CurrentCamera.SelectedItem.Mining.Value = true
            else
                break           
            end
            wait(0.1)
        end
    --  workspace.CurrentCamera.SelectedItem.Mining.Value = false
    end
end
local function Deactivate()
    script.Parent.Activation:FireServer(false)
--  workspace.CurrentCamera.SelectedItem.Mining.Value = false
    Active = false  
end

local Selected = false

local function SelectOre(Ore)
    if Ore.Parent == workspace.Mine and (Ore.Position - script.Parent.Parent.Torso.Position).Magnitude <= (Stats.Range * 6) then
        workspace.CurrentCamera.SelectedItem.Value = Ore
        script.Parent.SetTarget:InvokeServer(Ore)
        Selected = true
    elseif Ore and Ore.Parent:FindFirstChild("PlacedItem") then
        workspace.CurrentCamera.SelectedItem.Value = Ore.Parent
        script.Parent.SetTarget:InvokeServer(Ore.Parent)
        Selected = true
    else
        workspace.CurrentCamera.SelectedItem.Value = nil
        script.Parent.SetTarget:InvokeServer(nil)       
        Selected = false    
    end
end

local function Unselect()
    workspace.CurrentCamera.SelectedItem.Value = nil
    script.Parent.SetTarget:InvokeServer(nil)
    Selected = false
end

local function GetOreFromScreen(X,Y)
    local OldRay = workspace.CurrentCamera:ViewportPointToRay(X,Y)
    local DaRay = Ray.new(OldRay.Origin,OldRay.Direction*100)
    local Ore = workspace:FindPartOnRayWithIgnoreList(DaRay,workspace.Players:GetChildren())
    return Ore
end

game:GetService("UserInputService").TouchTap:connect(function(posArray, Processed)
    if Equipped and #posArray == 1 --[[and not Processed ]] then
        MobileMode = true
        local Position = posArray[1]
        local Ore = GetOreFromScreen(Position.X,Position.Y)
        if Ore ~= nil then
            SelectOre(Ore)
        else
            Unselect()
        end
    end
end)

local TouchPosition

local function CheckFrame()
    if Active and MobileMode then
        local Ore = GetOreFromScreen(TouchPosition.X,TouchPosition.Y)
        SelectOre(Ore)      
    end
    local CurOre = workspace.CurrentCamera.SelectedItem.Value 
    if Selected and (CurOre.Parent == nil or CurOre == nil) then
        Unselect()
    end
end

local CamPro = Enum.RenderPriority.Camera.Value

if game:GetService("UserInputService").TouchEnabled then
    game:GetService("RunService"):BindToRenderStep("FrameCheck",CamPro+1,CheckFrame)
end

game:GetService("UserInputService").TouchLongPress:connect(function(posArray, State, Processed)
    if State == Enum.UserInputState.End or State == Enum.UserInputState.Cancel or not Equipped then
        Deactivate()
    elseif #posArray == 1 and State == Enum.UserInputState.Begin --[[and not Processed ]]then
        TouchPosition = posArray[1]
        MobileMode = true
        local Ore = GetOreFromScreen(TouchPosition.X,TouchPosition.Y)
        if Ore ~= nil then
            SelectOre(Ore)
            Activate()
        else
            Unselect()
            Deactivate()
        end
    elseif State == Enum.UserInputState.Change and Active then
        TouchPosition = posArray[1]     
    end
end)

local Mouse = game.Players.LocalPlayer:GetMouse()
Mouse.Button1Down:connect(function()
    if Equipped and (game:GetService("UserInputService").MouseEnabled or game:GetService("UserInputService").GamepadEnabled) then
        MobileMode = false
        Activate()
    end
end)
Mouse.Button1Up:connect(function()
    if Equipped and (game:GetService("UserInputService").MouseEnabled or game:GetService("UserInputService").GamepadEnabled) then
        MobileMode = false
        Deactivate()
    end
end)


script.Parent.Unequipped:connect(function()
    Equipped = false
    Mouse.TargetFilter = nil
    Deactivate()
    Unselect()
end)

script.Parent.Equipped:connect(function(Mousee)
    Equipped = true
    Mouse = Mousee
    Mouse = game.Players.LocalPlayer:GetMouse()
    if diddy then
        diddy = false
        game.Players.LocalPlayer.Character.ChildAdded:connect(function(Child)
            if Child.Name == "Platform" then
                Child.CanCollide = true
            end
        end)
    end
    Mouse.TargetFilter = workspace.Players
    while script.Parent.Enabled and script.Parent.Parent:FindFirstChild("Humanoid") do
        local Ore
        if not workspace.CurrentCamera.Full.Value then
            if game:GetService("UserInputService").GamepadEnabled then
                local OldRay
                if game:GetService("UserInputService").MouseBehavior == Enum.MouseBehavior.LockCenter then
                    OldRay = workspace.CurrentCamera:ViewportPointToRay(workspace.CurrentCamera.ViewportSize.X/2,workspace.CurrentCamera.ViewportSize.Y/2)
                else
                    OldRay = workspace.CurrentCamera:ViewportPointToRay(workspace.CurrentCamera.ViewportSize.X/2,workspace.CurrentCamera.ViewportSize.Y/2.8)
                end
                local DaRay = Ray.new(OldRay.Origin,OldRay.Direction*100)
                Ore = workspace:FindPartOnRayWithIgnoreList(DaRay,workspace.Players:GetChildren())
            elseif game:GetService("UserInputService").MouseEnabled then
                Ore = Mouse.Target
            end
            if Ore then
                SelectOre(Ore)
            elseif not MobileMode then
                workspace.CurrentCamera.SelectedItem.Value = nil

            --  script.Parent.Target.Value = nil
                script.Parent.SetTarget:InvokeServer(nil)
            end
        elseif not MobileMode then
            workspace.CurrentCamera.SelectedItem.Value = nil
            script.Parent.SetTarget:InvokeServer(nil)
        end
        wait()
    end
    workspace.CurrentCamera.SelectedItem.Value = nil
    -- script.Parent.Target.Value = nil
    script.Parent.SetTarget:InvokeServer(nil)
end)