Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:4/4
K:C
['BG G2 AGED', 'dega b2 ag']  
X:1
L:1/8
M:4/4
K:C
 |[M:2/2][K:G] dc | BG G2 AGED | BGGd Bdgd | BG G2 AGED | EAAB A2 dc | BG G2 AGED | BGGd Bdgd | 
 B2 BG AGED | EGGA G2 || z2 | dega b2 ag | (3(efg) dg egdB | dega b2 ag | eaab a2 ge | dega b2 ag | 
 (3(efg) dg egdc | B2 BG AGED | EGGA G2 |]  