Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:2/4
K:G
['BB BG/B/ dd (d>c) BB AB/A/ G2', 'G4 [gBD]2 ([gB]>[gB]) [gB]3 (g f)(f e)(e']  
X:1
L:1/8
M:2/4
K:G
|: BB BG/B/ | dd (d>c) | BB AB/A/ | G2 G2 | AA (AB) | AF A2 | AA (B/A/)G/E/ | D2 D2 | BB BG/B/ | 
 dd (d>c) | BB AB/A/ | G2 G2 | AA (AB) | AF DD | G2 G>G | G4 :| [gBD]2 ([gB]>[gB]) | [gB]3 (g | 
 f)(f e)(e | d)(d c)(c | (D)F) (F/D/)F/A/ | c4 | cc (d/c/)B/A/ | GG GG | B2 B/G/G/B/ | d2 (d>c) | 
 BB AB/A/ | G2 G2 | AA (AB) | AF DD | G2 (G>G) | G4 :|  