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:Eb
['F G']  
X:1
L:1/8
M:4/4
K:Eb
 F G B4 z2 | G B c e B2 A G | F G F E C E F G | G E2 F E4 | F2 B2 F G F E | C3 E F3 G | 
 E F E C B,3 C | B,4 E2 B, C | E F D C B,4 | B G F G B2 e c | B2 A G F G F E | C E F G G E2 F | 
 E4 F3 B | G B G E F4 | G G G E F4 | F G B4 z2 | G B c e B2 A G | F G F E C E F G | G E2 F E4 | 
 F3 B G G G E | F4 C2 F2 | D2 C2 E3 C | E4 F2 C D | C B, A, G, B,2 C D | C B, G, F, E,4 |]  