Hip-hop dance developed from street styles in the 1970s and incorporates breaking, locking, and popping. It is performed to hip-hop music, which originated from turntablism and looping drum breaks. Hip-hop culture consists of four elements - rapping, DJing, breaking, and graffiti art. Rapping involves rhythmic spoken word over beats, while DJing refers to selecting music to play or manipulating sounds. Breaking is a style of dance that originated among Black and Puerto Rican youth. Graffiti involves unauthorized drawings or writings on surfaces.