Develop a musical composition using both the specified melodic theme and the alphabetical pattern naming.
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
['edc B2 B,2- B,2 (CD) (EFGA) (BFED)', 'E2 g2 (ga) (gf=ed) (cBAG) (FE) F2']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
 edc | B2 B,2- B,2 (CD) | (EFGA) (BFED) | C2 c2- c(egf) | (edcB){B} A2 F2 | (Bdfe) (dcBA) | 
 (GFED) E2 g2 | (fdcB) Ac e2 |1 (dB)(cA) B :|2 (dB)(cA) B2 B,2 |: f2 (fg) (fe)(dc) | 
 (B_AGF) (ED) E2 | g2 (ga) (gf=ed) | (cBAG) (FE) F2 | F(A/B/) cA F(B/c/) dB | F(c/d/) ec A2 g2 | 
 (fdcB) (Ac) e2 |1 (dB)(cA) B2 B,2 :|2 (dB)(cA) B |]  