Develop a musical composition using the outlined alphabetical depiction of the structure and the provided theme.
X:1
L:1/8
M:4/4
K:Eb
['(B>c) (B<G) F2', 'z B']  
X:1
L:1/8
M:4/4
K:Eb
 (G>A) | (B<e) (d<c) B2 (G>A) | (B>c) (B<G) F2 (B>D) |{F} E2 z E E3 G | (Fc) (BA){A} G2 (G>A) | 
 (B<e) (d<B) B2 G>A | (B>c) (B<G) F2 z3/2 D/ | E2 E2 E2 z G | (Fc) (BA){A} G3 B | e>f gg (fd) z B | 
 (c>d)e ee |] d3 B | g2 (f/e/d/c/) f3 g/f/ | d2 e c B2 z2 | (c>d) e e (dB) z G | A>B c c BGzE | 
 A3 (G/F/) (G e2) B | (AG)(FE) !fermata!B4 | (c>d) e e (dB) z G | (A>B) cc (BG) z E | 
 A3 (G/F/) (G e2) (d/c/) |{c} (BA/G/ B/A/) (B/F/) G2 z B |{c} (B/=A/B/c/B) _A G e z B | 
{c} (B/=A/B/c/B) _A G e z B | (B/c/d/e/) f (g/a/) (g/e/) z (c/A/) z | G2 E2 D2 z2 ||  