So in conjunction with my project idea, here’s the state machine that could be used for that project. The visual should be easy enough once I get to know how to use the multiplexers, but the audio might take a bit longer to understand what parts to use and how to operate those parts using the arduino (if an audio component is at all even possible with this project).
For my mp3 space, lighting will be a very important part of allowing and encouraging users to interact with the space and each other. For part A of this assignment, I want to make some LEDs dance to the music (using the LM3915 chip I learned about from the midterm) if there are 2 users. 
Due Thursday, March 20:
A state machine is a formalism that is used to describe interactive behavior. This exercise asks you to think about a design (yours, anyone’s) in terms of a state machine.
Design a state machine. Draw a state machine diagram. It will have states (circles with labels), transitions (arrows), conditions (one for each arrow), and actions (one for each state). In part “b” of this exercise, you will implement the state machine that you describe, in hardware and software. Your state machine should have at least three states.
One example of a state machine is the “count something” exercise that you did earlier in the semester. If you can’t think of anything else, draw the state machine for that example. Once you get started, though, you’ll begin to see the world in terms of state machines!
