Could anyone help me fix the FireBall Script?

I took All your advice, trying to pile the script together, but I need help fixing everything now. Can you guys tell me whats wrong with this?

Player = game.Players.LocalPlayer

repeat
    wait() until Player.Character

Char = Player.Character

Torso = Player.Character.Torso

Mouse = Player:GetMouse()

Attack = false

Debris = game:GetService("Debris")

Mouse.KeyDown:connect(function(key)
    local key  = key:lower()
    if key == "f" and (not Attack) then
        Attack = true
       for i = 0, 8, 1 do
            local Ball = Instance.new("Part")
            Ball.Name = "Bullets"
            Ball.Parent = game.Workspace
            Ball.Shape = "Ball"
            Ball.Size = Vector3.new(1,1,1)
            Ball.Transparency = .4
            Ball.TopSurface = "Smooth"
            Ball.BottomSurface = "Smooth"
            Ball.BrickColor = BrickColor.new("Really red")
            Ball.CFrame = Torso.CFrame * CFrame.new(0,0.5, -5)
            Ball.CanCollide = false
            local Fire = Instance.new("Fire")
            Fire.Parent = Ball
            local Bv = Instance.new("BodyVelocity")
            Bv.Parent = Ball
            Bv.maxForce = Vector3.new(math.huge,math.huge,math.huge)
            Bv.velocity = Torso.CFrame.lookVector * 250
            local connection = Ball.Touched:connect(function(hit)
            local PlayerIsFound = game:GetPlayerFromCharacter(hit.Parent)
            if PlayerIsFound then
            local HumanoidIsFound = hit and hit.Parent and hit.Parent:FindFirstChild("Humanoid")
            if HumanoidIsFound then
            HumanoidIsFound:TakeDamage(5)
        end
    end
end) 
            wait(.05)
            Debris:AddItem("Ball", 3)
       end
           end
           Attack = false
end)