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:G
['BGGB c2 Ac', 'GBAG FDDE FGAB']  
X:1
L:1/8
M:4/4
K:G
 d/c/ | BGGB c2 Ac | BGAG F D2 d/c/ | BGGB c2 Ac | BGAB c3 (d/c/) | BGGB c2 Ac | BGAG F D2 (B/c/) | 
 dBcA BG c>c | BGAF G3 || G | GBAG FDDE | FGAB c2 AF | GBAG FEFG | ABcA d2 (c/A/) | GBAG FDDE | 
 FGAB c3 (B/c/) | dBcA BG c>c | BGAF G3 ||  