How to make a First Person Script?

Now, how do make a script which makes the player fully zoomed in. And to add to that they cannot press 'O' or mouse wheel out of first person. Help?

Set the camera mode (a property in a Player) to 'LockFirstPerson' whenever the thing is triggered. E.G. if it were a tool, you would put something like this in a Local Script (I'm not sure whether local script makes much of a difference I just couldn't be bothered, L comes before S and you can put 'LocalPlayer')

tool = script.Parent
tool.Equipped:connect(function()
	game.Players.LocalPlayer.CameraMode = "LockFirstPerson"
end)
tool.Unequipped:connect(function()
	game.Players.LocalPlayer.CameraMode = "Classic"
end)

--Or do this if you want the person to be locked in First Person view when they join. In a normal script.

game.Players.PlayerAdded:connect(function(player)
	player.CameraMode = "LockFirstPerson"
end)

If none of the above didn't work put the following text into a Script and let it be in Workspace.

game.Players.PlayerAdded:connect(function(player) player.CameraMode = Enum.CameraMode.LockFirstPerson end)

First we want to do it whenever the Player is "Added" to our game

game.Players.PlayerAdded:connect(function(player)
end)

The above code starts a function for whenever the Player is "Added"

game.Players.PlayerAdded:connect(function(player)
	player.CameraMode = Enum.CameraMode.LockFirstPerson
end)

We have now made the player's CameraMode = Lock First Person

This is for a regular script. Here-

while true do
local c = game.Players:GetChildren()
for i = 1, #c do
	if c[i].ClassName == "Player" then
	c[i].CameraMode = "LockFirstPerson"
		end
	end
wait(0.00)
end

Hope that helps!

First, grab yourself a localscript.

player = game.Players.LocalPlayer player.CameraMode = "LockFirstPerson"