Hmm

while true do
    local ServerPlayers = game.Players:GetChildren()
    for i, v in pairs(ServerPlayers) do
            -- Objects
            local plr = game.Players:FindFirstChild(v.Name)
            local Screen = Instance.new("ScreenGui")
            local Frame = Instance.new("Frame")
            -- Properties
            Screen.Name = "Screen"
            Screen.Parent = plr.PlayerGui
            Screen.ResetOnSpawn = false

            Frame.Parent = Screen
            Frame.BackgroundColor3 = Color3.new(50, 250, 150)
            Frame.Position = UDim2.new(0, 0, 0, 0)
            Frame.Size = UDim2.new(1, 0, 1, 0)
            Frame.Active = false
            Frame.Draggable = false
    end
    wait(0.1)
end