We propose an environment that allows users to create music by leveraging playful visualization and organic interaction. Our attempt to improve ideas drawn from traditional sequencer paradigm has been made in terms of extemporizing music and associating with visualization in real-time. In order to offer different user experience and musical possibility, this system incorporates many techniques, including; flocking simulation, nondeterministic finite automata (NFA), score file analysis, vector calculation, OpenGL animation, and networking. We transform a sequencer into an audiovisual platform for composition and performance, which is furnished with artistry and ease of use. Thus we believe that it is suitable for not only artists such as algorithmic composers or audiovisual performers, but also anyone who wants to play music and imagery in a different way.