Create a musical composition using the given alphabetical pattern and melodic theme.
X:1
L:1/8
M:2/4
K:G
['GD GA Be e/f/g/e/ dB', 'g>f ed ef g>e dB', 'd g2 a2 b3']  
X:1
L:1/8
M:2/4
K:G
 B/A/ | GD GA | Be e/f/g/e/ | dB B/A/G/A/ | BA AB/A/ | GD GA | Be e/f/g/e/ | dB AB/A/ | G2 G :| d | 
 g>f ed | ef g>e | dB B/A/G/A/ | BA Ad | g>f ed | ef g>e | dB AB/A/ | G2 G :| d | g2 a2 | b3 d | 
 g2 a2 | b3 b/a/ | ge eg/e/ | dB g>e | dB AB/A/ | G2 G :|  