Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:4/4
K:C
['BAG Bcd', 'g2 d']  
X:1
L:1/8
M:4/4
K:C
[M:6/8][K:G] a"^gudgeon" ee (1:2:1a!p! vua ce (2:3:2a a E!p!uea feae f .Te cce ud!p! ea ea ad def[Q:1/8=160] .d/c/ | 
 BAG Bcd | edc Bcd | BAG Bcd | ecA A2 d/c/ | BAG Bcd | edc Bcd | e/f/gd ecA | BGG G2 :| G | 
 GBd g2 d | edc Bcd | GBd g2 d | ecA A2 d/c/ | BAG g2 d | edc Bcd | e/f/gd ecA | BGG G2 :|  