How do you change squads in Battlefield Bad Company Multiplayer?

There are two squads in Bad Company, the light blue and dark blue. I always find myself in the light blue squad which makes up only 10 to 30% of the players, while the dark blue squad is substantially larger.How do I go from light to dark?How do you change squads in Battlefield Bad Company Multiplayer?
i don't think you can really control it. unless you create a party before joining to the game, i think it just mixes everyone up.How do you change squads in Battlefield Bad Company Multiplayer?
You can't really control it at all, but then you don't have to.



There aren't TWO squads but way more than that. The light blue only represents YOUR squad where as the dark blue represents everyone else that isn't in your squad on your team.How do you change squads in Battlefield Bad Company Multiplayer?
Oh right i wondered what the light and dark blue was

Thanks guys