How do you divide teams evenly?

Answered it here: How do I make this spread the teams equally?

rval = 0 --  a value to count players in red team
bval = 0 -- in blue team
for i, player in pairs(game.Players:GetPlayers()) do -- get the players
    if rval < bval then -- if one has more players than the other
        player.TeamColor = BrickColor.new("Bright red")
        rval = rval + 1 -- adding the player to the value
    elseif rval > bval then -- the inverse
        player.TeamColor=BrickColor.new("Bright blue")
        bval = bval + 1
    else -- if they're equal
        player.TeamColor = BrickColor.new("Bright red")
        rval = rval + 1
    end
end