Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
M:4/4
K:C
['', 'BG{A}GB AFDE FEFG', '(Bc) dgga bgaf dcde']  
X:1
L:1/8
M:4/4
K:C
 .abc ||[M:2/2][K:G] (dc) | BG{A}GB AFDE | FEFG Adgd | BG{A}GB AGFA | (3(Bcd) cA G2 dc | 
 BG{A}GB AFDE | FEFG (3(ABc) de | f2 fd ecAc | BGAF G2 || (Bc) | dgga bgaf | dcde fdcA | 
 dgga bgag | fdcA G2 (Bc) | dgga bgaf | dcde fefg | abag fgag | fdcA G2 |]  