Craft a musical composition that incorporates the supplied alphabet sequence and motif.
X:1
L:1/8
Q:1/4=120
M:3/4
K:Eb
['B2 B2', 'z2 (ef) g2']  
X:1
L:1/8
Q:1/4=120
M:3/4
K:Eb
"^Slow and plaintively." (EF) | G2 G2 (GF) | E2 E2 (GA) | B2 B2 (c=A) | B2 z2 (cd) | e2 e2 (fe) | 
 c2 c2 (ec) | B2 B2 (cA) | (G2 F2) EF | G2 G2 (GA) | B2 B2 (GB) | c2 (cd)(ef) | (e2 d2) (ed) | 
 (cB)(GA)(Bc) | (c2 B2) (ec) | B2 G2 (GF) | E2 z2 |] (ef) | g2 f2 (eg) | f2 e2 (df) | e2 d2 (c=B) | 
 c2 z2 (ef) | g2 e2 (Bc) | B2 G2 EF | G2 B2 (ce) |{e} d2 z2 (cd) | e2 f2 (ed) | c2 e2 (dc) | 
 (BA)(GF)EG | F2 z2 EF | G2 B2 (Ac) | B2 e2 (dc) | B2 G2 (GF) | E2 z2 |]  