Develop a musical piece employing the provided motif and an alphabet-based structure.
X:1
L:1/4
M:4/4
K:Eb
['B2 G']  
X:1
L:1/4
M:4/4
K:Eb
 B | B2 G c | B2 G B | A2 F A | G2 z G | G2 A c | B2 G B | A2 F A | G2 z B | e2 d c | B2 G B | 
 B c A B | G2 z B | e2 d c | B2 G B | B c A B | G2 z2 | B2 G2 | A2 F2 | E2 A c | B2 z B | e2 d c | 
 B2 G B | B A G F | E2 z |]  