Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:4/4
K:A
['e2 cA', 'a2 ec']  
X:1
L:1/8
M:4/4
K:A
 f | e2 cA d2 df | e2 cA dBBa | e2 cA d2 fd | edcB cAA :| g | a2 ec d2 fd | a2 ec fBBg | 
 a2 ec d2 fd | edcB cAAg | a2 ec d2 fd | a2 ec fBBg | afec defa | edcB cAA ||  