Craft a musical piece that integrates the provided melodic theme and the corresponding alphabetical pattern.
X:1
L:1/8
M:2/2
K:G
['B3 A Bdge', 'ea{b}af g2 fd efge dBAB G3 f']  
X:1
L:1/8
M:2/2
K:G
 B3 A Bdge | d3 e dBGA | B3 A Bdge |1 dBAB G3 A :|2 dBAB G3 f || g2 fg edBd | g{a}gfg ea{b}af | 
 g2 fd efge | dBAB G3 f | g2 fg edBd | g{a}gfg e a3 | b g3 agab | gedB G3 A ||  