Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/4
M:4/4
K:Gmin
['G G B (A/G/)', 'D f d B (B/d/) c A']  
X:1
L:1/4
M:4/4
K:Gmin
|: G G B (A/G/) | A A c (B/A/) | G G B (A/G/) | d d d D :: f d B (B/d/) | c A F (G/A/) | 
 B (A/G/) F A | G (G/F/) G D :|  