How are gangs unified??

The gangs have two colors but usually they all have black so they wear the opposite to show which gang they represent. Gangs also have different symbols they use, same color bandanna as their shirt, and special words or abbreviations. There is certain things you have to do to get jumped into a gang, like usually there is a leader and he will give you certain things to do. But they all will usually have the same attitude and just act the same. If not then bad stuff will happen to that person. Even though your on the streets you still got rules for how to stick with your family (gang).