Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/16
M:4/4
K:Emin
['B4 BAAG'  
X:1
L:1/16
M:4/4
K:Emin
|:"Em" EFGA B2e2 B2e2 B4 |"B7" BAAG GFFE"Em" EFGA"^(B7)" B4 |"Em" EFGA B2e2 B2e2 B4 | 
"B7" BAAG GFFE"Em" EFE2- E4 ::"B7" BAAG GFFE"Em" E2F2 G2A2 |"B7" BAAG GFFE"Em" EFGA B4 | 
"B7" BAAG GFFE"Em" E2F2 G2A2 |"B7" BAAG GFFE"Em" EFE2- E4 ::"Am" cccc c2c2"Em" e2e2 B4 | 
"B7" BAAG GFFE"Em" EFGA B4 |"Am" cccc c2c2"Em" e2e2 B4 |"B7" BAAG GFFE"Em" EFE2- E4 :|  