Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:4/4
K:G
['G>A BB c2 c2', 'd2 ed c2 c2']  
X:1
L:1/8
M:4/4
K:G
 G>A BB c2 c2 | B>A BG A2 A2 | G>A BB c2 c2 | BG AA G4 | G>A BB c2 c2 | B>A BG A2 A2 | 
 G>A BB c2 c2 | BG AA G4 || d2 ed c2 c2 | BA Bc d2 d2 | d2 ed c2 c2 | BG AA G4 | d2 ed c2 c2 | 
 BA Bc d2 d2 | d2 ed c2 c2 | BG AA G4 ||  