Create a musical composition employing the given alphabetic structure and melodic theme.
X:1
L:1/16
Q:1/8=180
M:2/4
K:G
['G2B2A2B2 GBde d2d2', 'abag (fa)ge f2d2 Ac(ea) Ac(ea)']  
X:1
L:1/16
Q:1/8=180
M:2/4
K:G
|: G2B2A2B2 | GBde d2d2 | (df)gg (df)gg | (ea)ab a2a2 | G2B2A2B2 | GBde d2d2 | g2bg (ab)ge | 
 d2f2 g4 ::[K:D] a2a2- abag | (fa)ge f2d2 | Ac(ea) Ac(ea) | gefb a2f2 | a2a2- abag | (fa)ge f2d2 | 
 Ac(ea) Ac(ea) | d2f2 d4 :|  