Compose a piece of music that combines the given melodic theme with the assigned alphabetical pattern.
X:1
L:1/8
M:4/4
K:G
['BcdB G2 BG', 'Bcde d B3 dBgB aBgB']  
X:1
L:1/8
M:4/4
K:G
 BcdB G2 BG | DGBG DGBG | BcdB G2 BG | FGAB cedc | BcdB G2 BG | DGBG DGBG | dBcA BGAG | 
 FGAB cedc :| Bcde d B3 | dBgB aBgB | Bcde dcBc | Aaag fedc | Bcde d B3 | dBgB aBgB | bgaf gfed | 
 egfa gedc :|  