Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:2/4
K:G
['GB c2 Ac', 'e2 dc B>G', 'B2 G>B']  
X:1
L:1/8
M:2/4
K:G
 D | B>B GB | c2 Ac | B>B GB | AF DD | BB GB | c2 Ac | B>G A>F | G3 :| c | B>d dg | e2 dc | 
 B>G GB | AF Dc | B>d d<g | e2 dc | B>G AF | G3 :| z | B2 G>B | c2 A>c | B2 G>B | AF D2 | B2 G>B | 
 c2 A>c | B>G A>F | G3 :|  