Develop a musical creation based on the specified alphabetical structure and given motif.
X:1
L:1/8
Q:1/4=140
M:4/4
K:none
['BA G2', 'G2 _e2 dcBc']  
X:1
L:1/8
Q:1/4=140
M:4/4
K:none
 B_A G2 BA G2 | B_A GA GF F2 | =EF G_A Bc BA | G2 B2 d2 g2 | B_A G2 BA G2 | B_A GA GF F2 | 
 =EF G_A Bc BA | G8 :: G2 _e2 dcBc | d3 c B_AGF | G2 _e2 dcBc | d8 | cBcB cB_AG | FFG_A GF F2 | 
 f_edc B_AGF | G8 :|  