How to make a gui appear for everyone when a certain team touches a brick?

So basically like someone from the 'Really black' team color brick touches this brick and because he is apart of the 'Really black' brick color team the gui sets off for everyone, and if someone from the 'Really red' team touches it nothing happens. Also when the player from the 'Really black' team walks off the brick the gui is removed for everyone.

ty for any possible help

local guipopup = script.Parent
local gui = guipopup.NOTICE
local v = guipopup.CFrame:vectorToWorldSpace(Vector3.new(guipopup.Size.X/2,guipopup.Size.Y/2,guipopup.Size.Z/2))



guipopup.Touched:connect(function(hit)
local player = game.Players:GetPlayerFromCharacter(hit.Parent) 
if player and not player.PlayerGui:FindFirstChild("NOTICE") then 
local clone = gui:Clone()
clone.Parent = player.PlayerGui
while wait(1) do


not(player.Character.Torso.Position.x <= guipopup.Position.x + v.x and
player.Character.Torso.Position.x >= guipopup.Position.x - v.x and

player.Character.Torso.Position.y <= guipopup.Position.y + v.y + 18.5 and 

player.Character.Torso.Position.y >= guipopup.Position.y - v.y and 

player.Character.Torso.Position.z <= guipopup.Position.z + v.z and
player.Character.Torso.Position.z >= guipopup.Position.z - v.z)
then

clone:Destroy()
end
end
end
end)