What is going on with this code for an NPC? The animation is not playing!

My code:

local cd = 10
local initial = 1
local animator = nil
local ws = script.Parent.Parent.Speed.Value

function throw()
    local towere = game.Workspace.Towers:GetChildren()
    local tower = towere[math.random(1, table.getn(towere))]
    local rock = script.Parent.Handle:Clone()
    local sound = script.Sound:Clone()
    sound.PlayOnRemove = true
    sound.Parent = rock
    rock.Name = "Rock"
    local bodyGyro = Instance.new("BodyGyro")
    bodyGyro.Parent = rock
    bodyGyro.D = 500
    bodyGyro.P = 1000
    bodyGyro.MaxTorque = Vector3.new(3999999947964416, 399999991808, 400000001507328)
    local bodyForce = Instance.new("BodyForce")
    bodyForce.Parent = rock
    bodyForce.Force = Vector3.new(0, rock:GetMass() * game.Workspace.Gravity, 0)
    rock.Velocity = -1 * (rock.Position - tower.PrimaryPart.Position)
    rock.Parent = game.Workspace
    rock.Position = script.Parent.Handle.Position
    script.Parent.Parent.Speed.Value = ws
    repeat
        wait()
    until (rock.Position - tower.PrimaryPart.Position).Magnitude < 5
    rock:Destroy()
    if tower then
        tower.Stunned.Value = true
    end
end

repeat
    wait()
until script.Parent.Parent.Parent == game.Workspace.Enemies
initial = os.clock()
while true do
    repeat
        wait()
    until os.clock() - initial > cd
    if table.getn(game.Workspace.Towers:GetChildren()) ~= nil then
        ws = script.Parent.Parent.Speed.Value
        script.Parent.Parent.Speed.Value = 0
        local Humanoid = script.Parent.Parent.Humanoid.Animator
        local anim = Humanoid:LoadAnimation(script.Animation)
        print(anim)
        anim.Priority = Enum.AnimationPriority.Action
        anim:Play()
        wait(1.05)
        initial = os.clock()
        throw()
        wait(0.3)
    end
end