Compose a musical piece by utilizing the given alphabetic form and motif.
X:1
L:1/8
Q:1/8=180
M:4/4
K:Amin
['AB cBcA', 'g^fga g_bag']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:Amin
 AB | cBcA agfe | dcBA G4 | c2 ce B2 Bd | c2 B2 B2 AB | cBcA agfe | dcBA G2 AB | cBcA G2 ed | 
 c2 A2 A2 :| d2 | g^fga g_bag | ^f2 d2 d4 | =fefg fagf | e2 c2 c4 | g^fga g_bag | =fede fgfe | 
 dcBA G2 AB | c2 A2 A2 :|  