how do i make a path finding zombie?

this will be long but im in need of some help

local Humanoid = script.Parent:WaitForChild("Humanoid")
local RootPart = script.Parent:WaitForChild("HumanoidRootPart")
local head = script.Parent:WaitForChild("Head")
local Attack = script.Parent:WaitForChild("Attack")
local lowerTorso = script.Parent:WaitForChild("LowerTorso")
local AttackAnim = Humanoid:LoadAnimation(Attack)
AttackAnim.Priority = Enum.AnimationPriority.Action
local clone = script.Parent:Clone()
function walkRandomly()
    local xRand = math.random(-50,50)
    local zRand = math.random(-50,50)
    local goal = RootPart.Position + Vector3.new(xRand,0,zRand)
    local path = game:GetService("PathfindingService"):CreatePath()
    path:ComputeAsync(RootPart.Position, goal)
    local waypoints = path:GetWaypoints()
    if path.Status == Enum.PathStatus.Success then
    for _, waypoint in ipairs(waypoints) do
        if waypoint.Action == Enum.PathWaypointAction.Jump then Humanoid.Jump = true

        end
        Humanoid.MoveTo(waypoint.Position)
        Humanoid.MoveToFinished:Wait(1)
        local timeout = Humanoid.MoveToFinished:Wait(1)
        if not timeout then print("STUCK")
            Humanoid.Jump = true
            walkRandomly()
        end
    end
    else
        print("PathFailed")
        wait(1)
        walkRandomly()
    end
end

function findPath(target)
    local path = game:GetService("PathfindingService"):CreatePath()
    path:ComputeAsync(RootPart.Position,target.Position)
    local waypoints = path:GetWayPoints()

    if path.Status == Enum.PathStatus.Success then
        for_, waypoint in ipairs(waypoints) do
            if waypoint.Action == Enum.PathWaypointAction.Jump then
                Humanoid.Jump = true
            end
            Humanoid:MoveTo(waypoint.Position)
            local timeout = Humanoid.MoveToFinished:Wait(1)
            if not timeout then Humanoid.Jump = true
                print("Too Long")
                findPath(target)
                break
            end
            if checkSight(target) then
                repeat 
                    print("GoingToTarget")
                    Humanoid:MoveTo(target.Position)
                    Attack(target)
                    wait(0.1)
                    if target == nil then
                        break
                    elseif target.Parent == nil then
                        break
                    end
                until
                checkSight(target) == false or Humanoid.Health == 1 or target.Parent.Humanoid.Health == 0
                break
            end
            if (RootPart.Position - waypoints[1].Position).magnitude > 20 then
                print("Target Moved, generating new path")
                findPath(target)
                break
            end
        end
    end
    function checksight(target)
        local raything = Ray.new(RootPart.Position, (target.Position - RootPart.Position).Unit * 40)
        local hit,position = workspace:FindPartOnRayWithIgnoreList(raything, (script.Parent))
        if hit then
            if hit:IsDescendantOf(target.Position) and math.abs(hit.Position.Y - RootPart.Position.Y) < 3 then
                print("I can see target")
                return true
            end
        end
        return false
    end

    function findTarget()
        local distance = 100
        local target = nil
        local potentialtargets = {}
        local seetargets = {}
        for i,v in ipairs(workspace:GetChildren()) do
            local human = v:FindFirstChild("Humanoid")
            local torso = v:FindFirstChild("Torso") or v:FindFirstChild("HumanoidRootPart")
            if human and torso and v.Name ~= script.Parent.Name then
                if (RootPart.Position - torso.Position).magnitude < dist and human.Health > 0 then
                    table.insert(potentialTargets,torso)
                end
            end
        end
        if #potentialtargets > 0 then
            for i,v in ipairs(potentialTargets) do
                if checkSight(v) then
                    table.insert(seeTargets, v)
                elseif #seeTargets == 0 and (RootPart.Position - v.Position).magnitude < distance then
                    target = v 
                    distance = (RootPart.Position - v.Position).magnitude
                end
            end
        end
        if seeTargets > 0 then
            distance = 200
            for i,v in ipairs(seeTargets) do
                if (RootPart.Position - v.Position).magnitude < distance 
                    target = v 
                    distance = (RootPart.Position - v.Position).magnitude
            end
        end
    end

end
function attack(target)
    if (RootPart.Position - target.Position).magnitude > 5 then
        AttackAnim:Play()
        if target.Parent ~= nil then target.Parent.Humanoid:TakeDamage()
    end
    end
    function died()
        wait(5)
        clone.Parent = workspace
        game:GetService("Debris"):AddItem(script.Parent,0.1)
    end
    Humanoid.Died:Connect(died)
    lowerTorso.Touched:Connect(function(obj)
        if not obj.Parent:FindFirstChild("Humanoid") then
            Humanoid.Jump = true
    end)

function main() 
    local target = findTarget()
    if target then
        Humanoid.WalkSpeed = 16
        findPath(target)
    else
        Humanoid.WalkSpeed = 8
        walkRandomly()
    end
end
while wait(0.1) do
    if Humanoid.Health < 1 then
        break
    end
    main()
end