how do i do instance.new("boolvalue" players[i])?

Hiya, welcome to Scripting Helpers. I don't want to be the sour jelly bean but please try attempt making this your self.

For this script, you can use: Pairs an iPairs (Roblox Resource) to iterate over the players in a list

Something like:

for index, player in pairs(game:GetService("Players"):GetPlayers()) do
	local BoolValue = Instance.new("BoolValue", player)
	-- do something
end