Create a musical composition adhering to the provided thematic and alphabetical guidelines.
X:1
L:1/8
M:3/4
K:Eb
['BB/c/ B3']  
X:1
L:1/8
M:3/4
K:Eb
 BB/c/ | B3 AGA | cB B2 ec | B3 A/B/AG | G2 F2 BB/c/ | B3 AGA | cB B2 ec | B3 A/B/AG | 
 G2 F2 BB/c/ | B3 AAG | G2 F2 BB/c/ | B3 AAG | G2 F2 Bc/d/ | eccBBc/d/ | eccBcB/A/ | G3 BB/A/F | 
 F2 E2 Bc/d/ | eccBBc/d/ | eccBcB/A/ | G3 BB/A/F | E2 z2 |]  