"disable my ability to move forward or backward and add it to the script you just generated"

-- script for sell pad 
local part = script.Parent
local function collect(otherPart)
local player = game.Players:FindFirstChild(otherPart.Parent.Name)
       if player then
             local playerBag = player.leaderstats.Bag.Value
             if playerBag > 0 then
                   player.leaderstats.Bag.Value = 0
                   player.leaderstats.Coins.Value = player.leaderstats.Coins.Value + (playerBag * 25)
             end  
       end
end
part.Touched:Connect(collect)

-- script for part  
local part = script.Parent
local addPoint = true
local function collect(otherPart)
    local player = game.Players:FindFirstChild(otherPart.Parent.Name)
    if player and addPoint then
    local playerBag = player.leaderstats.Bag.Value
        if playerBag < 3 then
            addPoint = false
            player.leaderstats.Bag.Value = player.leaderstats.Bag.Value + 1
            part.Position = Vector3.new(math.random(-100,100),part.Position.Y, math.random(-100,100))
            wait(1)
            addPoint = true 
        end
    end
end
part.Touched:Connect(collect)

-- local script to disable forward and backward movement 
local player = game:GetService("Players").LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

local function disableForwardBackward()
    if humanoid.MoveDirection.Z ~= 0 then
        humanoid.MoveDirection = Vector3.new(humanoid.MoveDirection.X, humanoid.MoveDirection.Y, 0)
    end
end

humanoid.Running:Connect(disableForwardBackward)