Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
Q:1/2=120
M:4/4
K:A
['ecBc A2']  
X:1
L:1/8
Q:1/2=120
M:4/4
K:A
 e2 |"A" a2 e2 fecd |"A" ecBc A2 ef |"A" a2 a2 g2 a2 |"E" b4 b2 (3efg |"A" a2 e2 fecd | 
"A" ecBc A2 AB |"A" cBAF"E" E2 F2 |"A" A4 A2 :: B2 |"A" c4 B2 c2 |"A" ecBc A2 AB |"A" c2 c2 B2 c2 | 
"E" e4 e2 c2- | c2 c2 B2 c2 |"A" ecBc A2 AB |"A" cBAF"E" E2 F2 |"A" A4 A2 :|  