Develop a musical composition incorporating the given motif while adhering to the outlined alphabetical form.
X:1
L:1/8
M:12/8
K:G
['B2 A', 'dgg gba g3']  
X:1
L:1/8
M:12/8
K:G
|: B3 ABd e2 d d2 B | AGA B2 A G2 D D3 | B2 A ABd e2 d d2 B |1 AGA B2 A G3 G2 A :|2 
 AGA B2 A G3 B2 A |: d2 g g3 age d2 B | dgg gba g3 b2 g | d2 g gfg age d2 d |1 dgg gba g3 b2 g :|2 
 dgg gba g3 ged ||  