Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
Q:3/8=90
M:12/8
K:G
['e2 d']  
X:1
L:1/8
Q:3/8=90
M:12/8
K:G
 gdc B2 d A2 d G2 A | Bcd efg{f} e2 d c3 | Bdg{f} e2 d ^cea gfe | fag f>ed/c/ d3 D3 |:  