Raycast firing in random directions over time. How to fix?

game.ReplicatedStorage.ClickEvent.OnServerEvent:Connect(function(Player,FromP,ToP)
			Player.PlayerGui.ScreenGui.ClickScript.Disabled = true
			local Cooldown = script.Parent.Cooldown.Value
			Cooldown = false
			local animation =Instance.new("Animation")
			animation.AnimationId = "http://www.roblox.com/Asset?ID="..3689511152
			local loadedAnimation = script.Parent.Humanoid:LoadAnimation(animation)
			loadedAnimation:Play()
			wait(1.25)
			FromP = script.Parent.RightHand.Position
			ToP = ToP*-1
			local RayCast = Ray.new(FromP, (ToP-FromP).unit*100)
			local Part, Position = game.Workspace:FindPartOnRay(RayCast, 								Player.Character, false, true)
			local beam = Instance.new("Part")
			beam.Name = "Beam"
			beam.Parent = game.Workspace
			beam.CanCollide = false
			beam.Anchored = true
			beam.CastShadow = false
			beam.BrickColor = BrickColor.new("Dark indigo")
			beam.Material = "Neon"
			local Dist = (ToP-FromP).magnitude
			beam.CFrame = CFrame.new(FromP, Position)*CFrame.new(0,0,Dist/2)
			beam.Size = Vector3.new(0.3,0.3,Dist)
			wait(0.05)
			beam.Size = Vector3.new(0.6,0.6,Dist)
			beam.Transparency = 0.8
			wait(0.05)
			beam.Size = Vector3.new(0.9,0.9,Dist)
			beam.Transparency = 0.9
			wait(0.05)
			beam.Size = Vector3.new(1.2,1.2,Dist)
			beam.Transparency = 0.99
			wait(0.05)
			beam.Size = Vector3.new(1.6,1.6,Dist)
			beam.Transparency = 0.999
			wait(0.05)
			beam.Size = Vector3.new(2.2,2.2,Dist)
			beam.Transparency = 0.9999
			wait(0.1)
			beam.Size = Vector3.new(3,3,Dist)
			beam.Transparency = 0.99999
			wait(0.1)
			beam.Size = Vector3.new(4.2,4.2,Dist)
			beam.Transparency = 0.999999
			wait(0.1)
			beam.Size = Vector3.new(5.4,5.4,Dist)
			beam.Transparency = 0.9999999
			wait(0.1)
			beam.Size = Vector3.new(6.6,6.6,Dist)
			wait(0.75)
			beam.Size = Vector3.new(7.8,7.8,Dist)
			beam.Transparency = 0.99999999
			Cooldown = true
			wait(2)
			beam:remove()
			Player.PlayerGui.ScreenGui.ClickScript.Disabled = false
			
end)

Hi there! I'm having a problem with this script (see above.) When I test it initially it works as expected until I start firing the laser I created multiple times and it starts to fire off in the same direction over and over again and will only move if I gradually move it to where I want it to be (which takes like 15 minutes.) I just dont understand how raycasting works, somebody please explain in detail.

{WHAT THE SCRIPT DOES}

Disables the client-side click script (see below) Tests if the player clicks from the client on another script and uses a remote event to get it to the server. Creates an animation and makes the player use it. Creates two vectors for the raycasting (and inverts the other so it doesnt fire backwards) Creates a ray. Makes the laser out of a part and sets some properties. Sets the part's position. Makes an animation by modifying the transparency and size of the laser over time. Waits a couple seconds and removes the beam. Enables the client-side click script (see below)

local UserInputService = game:GetService("UserInputService")
local Mouse = game.Players.LocalPlayer:GetMouse()
UserInputService.InputBegan:Connect(function(input)
   local inputType = input.UserInputType
   if inputType == Enum.UserInputType.MouseButton1 then
		game.ReplicatedStorage.ClickEvent:FireServer(game.ReplicatedStorage.ForBullets.CFrame.Position, Mouse.Hit.Position)
		
    end
end)    

Thanks for taking the time to get to this point in my question!