Construct a musical composition following the given alphabetical structure and incorporating the specified motif.
X:1
L:1/8
M:4/4
K:G
['G2 AB A2', 'ED e2 dc BA Bc d2 BA']  
X:1
L:1/8
M:4/4
K:G
|: G2 AB A2 G(A | A)B BA Bc d2 | G2 AB A2 GA | cB AG EG ED :: e2 dc BA Bc | d2 BA GE E2 | 
 cB AG D2 G(E | E) c2 B cd BA :|  