while true do
   for _, v in pairs(game:GetService("Workspace").Stairs:GetChildren()) do
       firetouchinterest(game:GetService("Players").LocalPlayer.Character.HumanoidRootPart, v, 0)
       wait()
       firetouchinterest(game:GetService("Players").LocalPlayer.Character.HumanoidRootPart, v, 1)
   end
end