Develop a musical composition using the alphabetic representation of the specified sequence and incorporating the given motif.
X:1
L:1/8
M:4/4
K:A
['cBAG E2 C2 EF']  
X:1
L:1/8
M:4/4
K:A
"^A""A" cBAG E2 C2 |"A" EF A2"E7" B4 |"A" cBAG E2 C2 |"D" EF A2"A" A4 :|"^B""A" c2 ef e2 c2 | 
"A" Bc e2"A7" e4 |"D" f2 fg f2 e2 |"E7" Bc e2 e4 |"D" a2 ba"A" fe c2 |"A" ef e2"E7" c4 | 
"F#m" A2 Bc"Bm" BA F2 |"E7" EF A2"A" A4 :|  