Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:G
['', 'G2 GF GABc dBcA', 'egfe dBcA Bdeg f2 d2 d2 z', 'dc BGdG BGdG cAeA cAea gfge dBcA']  
X:1
L:1/8
M:4/4
K:G
 (3(DEF) |: G2 GF GABc | dBcA GABc | dBgf edcB | cAAG AcBA | G2 GF GABc | dBcA Gedc | BdBG AcAF |1 
 GBAF G2 (3(DEF) :|2 GBAF G2 (3def |: gdBd gbaf | gdBd egfe | dBcA Bdeg | f2 d2 d2 z f | 
 gdBd gdge | dBGB cAec | ecdB cAFG |1 GBAF G3 z :|2 GBAF G2 dc |: BGdG BGdG | cAeA cAeA | 
 BGdG BGdB | AGFE D2 dc | BGdG BGdG | cAeA cAea | gfge dBcA |1 GdBA G2 (3def :|2 GBAF G4 ||  