Develop a musical piece using the given chord progression.
'Em', 'B7', 'Em', 'Em', 'B7', 'Em', 'B7', 'Em'  
X:1
L:1/16
M:2/4
K:Edor
|:"Em" eBeg abag |{a} b2{a}b2 gfe2 | eBeg abag |{a} b4 b4- | bBeg abge |{a} b2{a}b2 gfe2 | 
"B7" fgag fefg |"Em" e8 ::"Em" bc'd'c' e'd'c'b | abc'd' b4 | e'd'c'b abc'd' | b4 b4 | 
 bc'd'c' e'd'c'b | abc'd' b4 |1 bc'd'c'"B7" bc'(3(gfe) |"Em" fge2- e4 :|2 abc'b"B7" abgf | 
"Em" e8 |]  