Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/8
M:4/4
K:G
['G>B d2 e>^c d>BG>B d>^ce>c d2 (3def', 'c2 (3BdB G2 G>BA>G F>GA>B c>de>f']  
X:1
L:1/8
M:4/4
K:G
|: G>B | d2 e>^c d>BG>B | d>^ce>c d2 (3def | g>fe>d c>BA>G | F>GA>B A2 A>B | c2 d>B c>AF>A | 
 c>Bd>B c2 (3cdc | a>gf>e d>ed>c |1 c2 B2 B2 :|2 B2 G2 G2 |: g>f | (3ege c2 (3ege c2 | 
 (3BdB G2 G>BA>G | F>GA>B c>de>f | a>g (3gfe d2 g>f | (3ege c2 (3ege c2 | (3BdB G2 G>BA>G | 
 F>GA>B c>de>f | g2 g2 g2 :|  