Roblox Script Generated by ScripterAI

"create a zombie NPC that follows players, attack players and do damage, and has pathfinding and obstacle avoidance"

-- server script 
local PathfindingService = game:GetService("PathfindingService")
local Players = game:GetService("Players")
local Zombie = game.Workspace.Zombie
local attackRange = 5
local damage = 10
local attackCooldown = 2

function findNearestPlayer(zombiePosition)
    local nearestPlayer = nil
    local minDistance = math.huge
    for _, player in ipairs(Players:GetPlayers()) do
        if player.Character and player.Character:FindFirstChild("HumanoidRootPart") then
            local distance = (player.Character.HumanoidRootPart.Position - zombiePosition).Magnitude
            if distance < minDistance then
                minDistance = distance
                nearestPlayer = player
            end
        end
    end
    return nearestPlayer
end

function followAndAttackPlayer(zombie, player)
    local path = PathfindingService:CreatePath()
    local humanoid = zombie:WaitForChild("Humanoid")
    local rootPart = zombie:WaitForChild("HumanoidRootPart")
    local canAttack = true
    
    local function attack()
        if canAttack then
            canAttack = false
            local character = player.Character
            if character and character:FindFirstChild("Humanoid") then
                character.Humanoid:TakeDamage(damage)
            end
            wait(attackCooldown)
            canAttack = true
        end
    end

while true do
        if player.Character and player.Character:FindFirstChild("HumanoidRootPart") then
            path:ComputeAsync(rootPart.Position, player.Character.HumanoidRootPart.Position)
            local waypoints = path:GetWaypoints()
            for _, waypoint in ipairs(waypoints) do
                humanoid:MoveTo(waypoint.Position)
                humanoid.MoveToFinished:Wait()
                if (rootPart.Position - player.Character.HumanoidRootPart.Position).Magnitude <= attackRange then
                    attack()
                end
            end
        end
        wait()
    end
end

while true do
    local nearestPlayer = findNearestPlayer(Zombie.HumanoidRootPart.Position)
    if nearestPlayer then
        followAndAttackPlayer(Zombie, nearestPlayer)
    end
    wait()
end