Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:2/2
K:G
['(B2 d2) dB dBdB g3 (a g)age', '[GB]2 [G_B]2- ([GB]G)([GB]G) AB [GB]2 [GB]3 [G_B]-']  
X:1
L:1/8
M:2/2
K:G
 (B2 | d2) dB dBdB | g3 (a g)age | c3 c c2 (B2 | A)B[ce][ce] [ce]2 ag | fgfd ed A2 | f3 g f2 gf- | 
 f(f/4g/4f/) ed Bd A2 | [GB]3 [GB] [GB]2 |: [G_B]2- | ([GB]G)([GB]G) AB [GB]2 | 
 [GB]3 [G_B]- [GB]2 D2- | D2 [GB]G AGFD | ([EA-][FA-]) [FA]4 !slide![FA]2- | ([FA]F)([FA]F) AcBA | 
 [FA]3 F [FA]2 [FA]2- | [FA]FAc BGAF | [G,G]6 :|  