Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/4
Q:1/4=200
M:3/4
K:Eb
['E z']  
X:1
L:1/4
Q:1/4=200
M:3/4
K:Eb
"Eb" E2 z | G2 z |"Bb" B/B/ B B, |"Eb" E z B, | E z E/E/ |"Bb" D F B | D z D/D/ |"Bb" E G B |: 
"Eb" E z E/E/ |"Bb" D F B |[M:2/4] D D/D/ |[M:3/4]"Eb" E E z :|  