Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:2/2
K:Gmin
['vB,4 A,4 (3G,B,D (3GBd g2 z2', '(3agf (3edc']  
X:1
L:1/8
M:2/2
K:Gmin
 vB,4 A,4 | (3G,B,D (3GBd g2 z2 | (3vcde (3ABc (3^FGA D2 | (3cde (3ABc ^FGA D2 | vB,4 A,4 | 
 (3G,B,D (3GBd g2 z2 | d>^cd>e (d<A) z3/2 e/ |1 d>cB>A G2 z2 :|2 d>cB>A G2 F2 |]: 
 (vB>.A)(B>.c)"^SEGUE" d>c B2 | c>=Bc>d e>d c2 | f>=ef>g a>gf>e | d>cB>G (u_G2 F2) | 
 vB>AB>c d>c B2 | c>=Bc>d e>d c2 | f>=ef>g a>g f2 |1 (3agf (3edc B2 F2 :|2 
 (3agf (3edc B2"^D.C." G,>A, |]  