Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
Q:1/8=300
M:4/4
K:G
['BAGE D2 D2 BAB^c d2 d2 cBAG', 'Bdef gfed']  
X:1
L:1/8
Q:1/8=300
M:4/4
K:G
 BAGE D2 D2 | BAB^c d2 d2 | cBAG E2 E2 | D2 EF G2 G2 :| Bdef gfed | Bd (3efg a2 a2 | Bdef gfed | 
 BGAF G2 G2 :|  