Develop a musical composition by utilizing the given alphabetic notation and supplied motif.
X:1
L:1/8
M:3/4
K:Amin
['ec (3e^gb a>=g e^d (3efe =dc A^G', 'A2 (3cdc (3B^GB A2']  
X:1
L:1/8
M:3/4
K:Amin
 ec (3e^gb a>=g | e^d (3efe =dc | A^G (3Ace g>f | d2 e2 z2 :: A2 (3cdc (3B^GB | A2 A>^G E2 | 
 A2 (3cdc (3B^GB | A2 A>^GE>G | A>^G (3ABc e>d | B>^G A2 z2 :|  