I would advise you to NOT take steroids. Although they do provide you with a HUGE increase in muscle mass, the side effects are very scary. There are too many negative side effects to list here. I would recommend you to explore this link : http://en.wikipedia.org/wiki/Anabolic_steroid

But seriously, DO NOT TAKE STEROIDS!, if you want bigger muscles or whatever is it that you want, work hard for it. Nothing comes easy in this world. But at the end of the day, when you look into the mirror, you will be thinking that it is all worth it in the end.