Simple Arduino code

I'm looking for someone with a good knowledge of Arduino to remote in to my computer and help me finish a sketch this morning. I'm working with a Bare Conductive touch board (very simple set up all working fine). This has 12 electrodes, and each individual press plays a MIDI note. So that's all working well too. Where this needs to get to is: - Every time user presses (random 5, 25) electrodes (or plays this many notes), the position of the notes that have been played are swapped. Eg. user presses A, C, G 5 times, notes are now G, C, A, others are left the same. - Program loops drawing a new random number each time, watching for which electrodes are pressed, swapping accordingly. I've got some bits of that functionality a little of the way there if this is helpful. Please let me know if you think this is a problem you can solve, would love to work with the right person. Thanks.