1st attempt at Arduino step sequencer

Using an Arduino Duemilanove and Sparkfun midi shield as a step sequencer for a synth. The synth is a MeeBlip Micro on its init patch. For now, it has 4 steps and light up the LEDs using binary code to show which step is being edited. Buttons 1 and 2 select a step to edit and button 3 tells it to set the note based on the value of Potentiometer 2. Potentiometer 1 sets the tempo (crudely).

Problems so far; it's kind of slow to detect button presses, the timing isn't very even, and it causes the MeeBlip to emit glitchy clicking sounds, which are kind of cool but not desirable for my goal.