Can someone help me?

Ok, so I made a skill in a local script and it works but I need it to do damage, I tried putting in something like this for it to do damage but it didnt work. So I was wondering if someone could help me. I would really appreciate it, and btw I put the skill script also just in case you need it.

 humanoid:TakeDamage(5)

Player = game.Players.LocalPlayer
Char = Player.Character
Torso = Char.Torso
Mouse = Player:GetMouse()

function Move(key)
    key = key:lower()
    if key == "z" then
        print ("z was pressed")
        game.Players.LocalPlayer.Character.Torso.Anchored = true
        for i = 1, 100, 3 do        
            Move = Instance.new("Part")
            Move.Parent = Workspace
            Move.Size = Vector3.new(math.random(4,6), math.random(4,6), math.random(4,6))
            Move.Anchored = true
            Move.TopSurface = 0
            Move.BottomSurface = 0
            Move.BrickColor = BrickColor.new("Brown")
            game.Players.LocalPlayer.Character.Torso.Anchored = false
            y = Instance.new("BodyVelocity")
            y.maxForce = Vector3.new(math.huge, math.huge, math.huge)
            y.velocity = Player.Character.Torso.CFrame.lookVector*80
            Move.Parent = Workspace
            y.Parent = Move
            Move.CFrame = Player.Character.Torso.CFrame*CFrame.new (0, 0, -12)*CFrame.new (0,0,-i)CFrame.Angles(math.random(), math.random(), math.random())
            wait()          
        end
    end
end
Mouse.KeyDown:connect(Move)