Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:2/2
K:G
['', 'd/c/ Bcde dBBe dBgB bBgB Bcde dBBd', 'BABd GGBA GBDB GBDB']  
X:1
L:1/8
M:2/2
K:G
 d/c/ |: Bcde dBBe | dBgB bBgB | Bcde dBBd | cAag fefd :| BABd GGBA | GBDB GBDB | B2 AG GGAG | 
 FGAB cAec | BABd GGBA | GBDB GBDB | dBcA BGAF | DEFG ABcd ||  