Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:2/4
K:Emin
['Be Be']  
X:1
L:1/8
M:2/4
K:Emin
|:"Em" Be Be | Be e>e |"C" cA GE |"^(Am)" C3 D/C/ |"B7" B,^D FA | B2 B>c |1 BA GA |"Em" B2 B2 :|2 
 BA GF |"Em" E4 |]:"D" DF A>c | c"G"B B2 |"E7" E^G B>d | d"Am"c c2 |"Am" E/A/c/e/ aa | 
"Em" E/G/B/e/ gg |"B7" fb/a/ g/f/^d/B/ |"Em" e2 e2 :|  