what is wrong with this script that makes a player change team when they kill someone?

player.CharacterAdded:connect(function(character) character:WaitForChild("Humanoid").Died:connect(function() local tag = character.Humanoid:FindFirstChild("creator") if tag ~= nil then if tag.Value ~= nil then player.TeamColor = BrickColor.new("Really blue") end end end) end) end)

i wanted to make if player kills someone they go to a team