How can I make the player camera toggle between modes?

I've tried this in a normal script inside workspace

local player game.Players:GetPlayers()

while true do
    if player.Playing.Value == 1 then
    player.CameraMode = "LockFirstPerson"
    elseif player.Playing.Value == 0 then
        player.CameraMode = "Classic"
    wait(.5)
end
    end

I tried to look it up but I couldn't find anything, so I hope you guys can help.