Build a musical piece by incorporating the given motif into the prescribed form.
X:1
L:1/8
M:4/4
K:E
['B2 ce', 'f2 gf e2'  
X:1
L:1/8
M:4/4
K:E
 E2 GE FGEF | E2 Bc BGFG | B2 ce f2 ec | B2 ce fgfe | c2 B2 G2 EG | E2 GE FGEC | EFGB c2 z e | 
 BGFG E3 c | B2 GE FGEF | E2 Bc BGFG | B2 ce f2 ec | B2 ce fgfe | c2 B2 G2 EG | E2 GE FGEC | 
 EFGB c2 z g | fefg e3 f |: g2 fe f2 gf | e2 cA B2 GA | B2 ce f2 gf | e2 cB GFFG | E2 ge f2 gf | 
 e2 cA B2 z c | BEcE B3 g |1 fefg e2 ef :|2 fefg e4 ||  