How can I make a npc use this ability?

https://gyazo.com/86e133d4c6b4c42f5df6729bb4179708

I want npc to use this attack. but I do not know where to start

Someone can help me ?

theses are the code

local script

local plrs = game:GetService("Players")
local player = plrs.LocalPlayer
local uis = game:GetService("UserInputService")
local Mouse = player:GetMouse()
local tool = player.Backpack:FindFirstChild("Ninja")
local remote = game.Workspace.Events.Ninja

if tool then
	
	uis.InputBegan:Connect(function(key)
		if key.KeyCode == Enum.KeyCode.G then
			remote:FireServer(Mouse.Hit)
		end
	end)
	
end

script

game.Workspace.Events.Ninja.OnServerEvent:Connect(function(player, Mouse)
	
	print("Ninja")
	
	local shuriken = game.ReplicatedStorage.ninja:Clone()
	
	shuriken.Parent = game.Workspace
	
	shuriken.Anchored = true
	
	shuriken.CFrame = player.Character.HumanoidRootPart.CFrame * CFrame.new(0,1,0)
	
	local shuriken1 = shuriken:Clone()
	
	shuriken1.Parent = game.Workspace
	
	shuriken1.Anchored = true
	
	shuriken1.CFrame = player.Character.HumanoidRootPart.CFrame * CFrame.new(-3,1,4)
	
	local shuriken2 = shuriken:Clone()
	
	shuriken2.Parent = game.Workspace
	
	shuriken2.Anchored = true
	
	shuriken2.CFrame = player.Character.HumanoidRootPart.CFrame * CFrame.new(3,1,4)
    
    shuriken.Anchored = false

    local bv = Instance.new("BodyVelocity", shuriken)

    bv.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
   
    bv.Velocity = Mouse.lookVector * 80

    shuriken1.Anchored = false

    local bv = Instance.new("BodyVelocity", shuriken1)

    bv.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
   
    bv.Velocity = Mouse.lookVector * 80

    shuriken2.Anchored = false

    local bv = Instance.new("BodyVelocity", shuriken2)

    bv.MaxForce = Vector3.new(math.huge,math.huge,math.huge)
   
    bv.Velocity = Mouse.lookVector * 80

    shuriken.Touched:Connect(function(h)
	
	local roi = h.Parent:FindFirstChild("Part")
			
		local hrp = h.Parent:FindFirstChild("HumanoidRootPart") or h.Parent:FindFirstChild("Torso")
			
		if h.Parent:FindFirstChild("Humanoid") ~= nil and h.Parent then
				
		if h.Parent.Name == player.Name then return end
				
		h.Parent.Humanoid:TakeDamage(30)
		
		shuriken:Remove()
		
		if not hrp then
			
			print("Parede")
			
		end
		
		if hrp then
			
		print("Player get")
		
		local plasma = game.ReplicatedStorage.alek:Clone()
		
		plasma.Parent = game.Workspace
		
		plasma.Position = hrp.Position
			
		local explo = game.ReplicatedStorage.plasma:Clone()
		
		explo.Parent = game.Workspace
		
		explo.Position = hrp.Position
		
		local teen = game:GetService("TweenService")
		
		local i = TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
		
		local pro = {
			Size = Vector3.new(100,100,100),
			Transparency = 1
		}
		
		local start = teen:Create(explo,i,pro)
		
		start:Play()
		
		wait(1.5)
		
		plasma:Remove()
			
		end
		
		end
	
     end)

    shuriken1.Touched:Connect(function(h)
	
     local hrp = h.Parent:FindFirstChild("HumanoidRootPart") or h.Parent:FindFirstChild("Torso")
			
		if h.Parent:FindFirstChild("Humanoid") ~= nil and h.Parent then
				
		if h.Parent.Name == player.Name then return end
				
		h.Parent.Humanoid:TakeDamage(30)
		
		shuriken1:Remove()
		
		if not hrp then
			
			print("Parede")
			
		end
		
		if hrp then
			
		print("Player get")
			
		local explo = game.ReplicatedStorage.plasma:Clone()
		
		explo.Parent = game.Workspace
		
		explo.Position = hrp.Position
		
		local teen = game:GetService("TweenService")
		
		local i = TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
		
		local pro = {
			Size = Vector3.new(100,100,100),
			Transparency = 1
		}
		
		local start = teen:Create(explo,i,pro)
		
		start:Play()
			
		end
		
		end
	
     end)

    shuriken2.Touched:Connect(function(h)
	
        local hrp = h.Parent:FindFirstChild("HumanoidRootPart") or h.Parent:FindFirstChild("Torso")
			
		if h.Parent:FindFirstChild("Humanoid") ~= nil and h.Parent then
				
		if h.Parent.Name == player.Name then return end
				
		h.Parent.Humanoid:TakeDamage(30)
		
		shuriken2:Remove()
		
		if not hrp then
			
			print("Parede")
			
		end
		
		if hrp then
			
		print("Player get")
			
		local explo = game.ReplicatedStorage.plasma:Clone()
		
		explo.Parent = game.Workspace
		
		explo.Position = hrp.Position
		
		local teen = game:GetService("TweenService")
		
		local i = TweenInfo.new(1, Enum.EasingStyle.Linear, Enum.EasingDirection.Out, 0, false, 0)
		
		local pro = {
			Size = Vector3.new(100,100,100),
			Transparency = 1
		}
		
		local start = teen:Create(explo,i,pro)
		
		start:Play()
			
		end
		
		end
	
     end)

    wait(2)

    shuriken:Remove()
    shuriken1:Remove()
    shuriken2:Remove()
end)