New BossFight System But Break In Story Style

function BossFight_System(NPCName)
    local Boss_Monster = workspace[NPCName]

    local function playMonsterAnimation()
        local animation = Instance.new("Animation",Boss_Monster)
        animation.AnimationId = "https://roblox.com/assets/?id=1083195517"

        local humanoid = Boss_Monster:FindFirstChild("Humanoid")
        humanoid:LoadAnimation(animation):Play()

        wait(1)

        animation:Destroy()
    end

    local function playMonsterAttackAnimation()
        local animation = Instance.new("Animation",Boss_Monster)
        animation.AnimationId = "https://roblox.com/assets/?id=115300646506302"

        local humanoid = Boss_Monster:FindFirstChild("Humanoid")
        humanoid:LoadAnimation(animation):Play()

        wait(1)

        animation:Destroy()
    end

    local function fireballchallenge()
        for i=1,3 do

            playMonsterAnimation()

            playMonsterAttackAnimation()

            for i,player in pairs(game.Players:GetPlayers()) do
                if player.Character then
                    local fireball = game.ReplicatedStorage.Fireball:Clone()
                    local target = game.ReplicatedStorage.Target:Clone()


                    target.Parent = game.Workspace
                    target.CFrame = (player.Character.HumanoidRootPart.CFrame - Vector3.new(0,3,0)) * CFrame.Angles(0,0,math.rad(90))

                    wait(0.5)

                    fireball.Parent = game.Workspace
                    fireball.CFrame = target.CFrame + Vector3.new(0,60,0)

                    wait(2)

                    target:Destroy()
                end
            end

            wait(1)
        end
    end

    local function Boss_Minions()

        local MinionsModel = game.ReplicatedStorage.BossMinions:Clone()
        MinionsModel.Parent = workspace

        wait(10)

        MinionsModel:Destroy()

    end

    while wait(5) do
        if Boss_Monster.Humanoid.Health > 0 then

            Boss_Monster.ForceField.Visible = true
            Boss_Monster.SelectionBox.Visible = false
            Boss_Monster.ClickScript.Disabled = true

            fireballchallenge()
            Boss_Minions()

            Boss_Monster.ClickScript.Disabled = false
            Boss_Monster.SelectionBox.Visible = true
            Boss_Monster.ForceField.Visible = false

        else
            break
        end
    end

    repeat wait(0.1) until Boss_Monster.Humanoid.Health == 0

    Boss_Monster:Destroy()
end