Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:2/2
K:G
['dedc BG G2', 'g2 ga']  
X:1
L:1/8
M:2/2
K:G
 dedc BG G2 | cBAc Bd d2 | dedc BG G2 | =FGAF [GB]3 G | Gedc BGGc | =FGAc Bd d2 | dedc BG G2 | 
 =FGAF [GB]3 G | Gedc BGGG | =FGAc Bd d2 | dedc BG G2 |[M:2/4] =FGAF |[M:2/2] [GB]3 G [GB]2 ef |: 
 g2 ga g2 dd | g2 ga b2 a2 | g2 ga g2 ga | gfed Bd d2 :|  