Compose a tune that integrates the letter-based representation of the determined musical pattern and the given melodic idea.
X:1
L:1/8
M:4/4
K:G
['gage dBGA B2', 'ABce dBGA B2']  
X:1
L:1/8
M:4/4
K:G
 gage dBGA | B2 AG BG B2 | gage dBGA | B2 AF G2 D2 :: ABce dBGA | B2 AG BG B2 | ABce dBGA | 
 B2 AF G2 D2 :|  