why isnt my checking for alive players working? :) should be alright normaly

So i wrote this down and it should work normaly but it gives me this error code

ServerScriptService.MainScript:140: '=' expected near '=='

Here is the script ( i got 2 teams 1 attacker and 1 defender )

        Attackeralive = 0
        Defenderalive = 0
    for i = 20,0,-1 do
        status.Value = i.." seconds remaining"
        wait(1)
    if i == 0 then
        status.Value = "Defender won! Hostage is safe!"
        break
    else game.Players:GetPlayers()[_G.gameplayers].TeamColor == BrickColor.new("Lapis") then
        Defenderalive = Defenderalive + 1
    end
    elseif game.Players:GetPlayers()[_G.gameplayers].TeamColor == BrickColor.new("Persimmon") then
        Attackeralive = Attackeralive + 1
    end
end
if not Defenderalive == 0 and not Attackeralive == 0 then 
    wait(1)
end
end
if Defenderalive == 0 and Attackeralive == then 
    status.Value = "Both Team got Eliminated!"
end
if Defenderalive > 0 and Attackeralive == 0 then
    status.Value = "The Defender won and rescured the Hostage!"
    wait(3)
end
if Defenderalive == 0 and Attackeralive > 0 then
    status.Value = "Attackers Eliminated all Defenders and got away with the Hostage"
    wait(2)
end
end
end