Hand-to-hand combat system not working, a little help?

INFORMATION: I was making a left and right mouse button hand-to-hand combat system, but I've hit a stump that i need help solving.

PROBLEM: I wanted to make it where if you press the left button four times than the right button quick enough, it would do a special action, but when I test it out, nothing happens.

CODE:

UserInputService.InputBegan:Connect(function(Input, Processed)
    if Processed then return end
    if Input.UserInputType == Enum.UserInputType.MouseButton1 then -- Light Attack
        if not Attacking then
            Attacking = true
            Action = "Light Attack"

            if Airborn == true then
                print("Air Cancel")
                -- Stuff
            else
                print("Light Attack")
                -- Normal Function
                if tick()-Timer > 1 then
                    L_Combo = 0
                    H_Combo = 0
                    Action = ""
                end

                L_Combo = L_Combo + 1

                -- Combo Function
                if H_Combo == 3 and L_Combo == 1 then
                    print("Kick Away")
                    H_Combo = 0
                    L_Combo = 0
                end

                --[[
                local Animation = Humanoid:LoadAnimation(Animations["L_Attack"..L_Combo])
                Animation:Play()

                Events["Attack"]:InvokeServer(Action)
                --]]

                if L_Combo >= 5 then
                    L_Combo = 0
                end
            end

            wait(0.4)
            Attacking = false
            Action = ""
        end
    elseif Input.UserInputType == Enum.UserInputType.MouseButton2 then -- Heavy Attack
        if not Attacking then
            Attacking = true
            Action = "Heavy Attack"

            if Airborn == true then
                print("Downward Kick")
                -- Stuff
            else
                print("Heavy Attack")
                -- Normal Function
                if tick()-Timer > 1 then
                    L_Combo = 0
                    H_Combo = 0
                    Action = ""
                end

                H_Combo = H_Combo + 1

                -- Combo Function
                if L_Combo == 4 and H_Combo == 1 then
                    print("Launcher")
                    H_Combo = 0
                    L_Combo = 0
                end

                --[[
                local Animation = Humanoid:LoadAnimation(Animations["H_Attack"..H_Combo])
                Animation:Play()

                Events["Attack"]:InvokeServer(Action)
                --]]

                if H_Combo >= 4 then
                    H_Combo = 0
                end
            end

            wait(0.5)
            Attacking = false
            Action = ""
        end
    end
end)

Can I get some assistance on solving this?