On the far opposite end of the spectrum, some artists choose to take only an idea or motif (e.g. a bassline, rhythm pattern, or chord progression), realize it from scratch with electronic instruments on-the-spot, and then build upon it, modify it, and continue in this way for the entire performance. This requires a degree of discipline, technical musical skill and creativity to achieve. Additionally, some electronic musicians are also able to play keyboards, percussion and other conventional instruments, and will incorporate instrument playing with live manipulations of samples, effects, and electronics. Such situations meet the criteria of a live musical performance, since physical movements directly affect music.