Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/8
M:3/4
K:C
['G2 cg eG Bg', 'fG Bd']  
X:1
L:1/8
M:3/4
K:C
 G2 |:"C" cg eG !>!c2 |"G7" Bg fG !>!B2 | Bg fG Bd |"C" cg eG c2 | cg eG ce |"G7" Bg fG B2 | 
 Bg fG Bd |1"C" c2 z2 G2 :|2"C" c2 z2 (3(c'ba) |:"G7" g2 fG Bd |"C" g2 eG ce |"G7" ag fG Bd | 
"C" ce gc' ba |"G7" g2 fG Bd |"C" g2 eG ce |"G7" ag fG Bd |1"C" c2 z2 (3(c'ba) :|2"C" c2 z2 z2 |]  