In the song Misery, the verse progression uses the chords C, F and G, but the chorus switches to Am, C and G. This change creates a contrasting section that takes on a different feel. If you want ...
Using MIDI over USB, it plays the I-V-vi-IV progression in any key. It plays in chord mode, arpeggiated mode, or mixed mode at any sensible tempo. You can check out a video of the 4chord playing ...