How do i execute a change team script?

the script is

function checker()
c = game.Players:GetChildren()
    for num, obj in pairs(c) do
        if obj.Character.Humanoid.Health == 0 then
        if obj.Teamcolor == BrickColor.new("Bright blue") then 
            obj.Teamcolor =  BrickColor.new("Bright red")   

checker() -- this to loop the checking  
end
end
end
wait() --  this is to loop the checking
checker()
end
checker()

make sure the color off the team is the same in the script and the team leaderboard then it will work