Compose a piece using the specified musical pattern based on the alphabet and the provided melodic theme.
X:1
L:1/8
M:2/2
K:Bb
['Fdcd BFDE Fdcd B2 cd ecAc ecAF', 'bagb ag']  
X:1
L:1/8
M:2/2
K:Bb
 DE | Fdcd BFDE | Fdcd B2 cd | ecAc ecAF | Bcde f2 (DE) | Fdcd BFDE | Fdcd B2 cd | ecAc ecAF | 
 [DB]2 d2 [DB]2 :| [G,D]2- | [G,D]2 ab g2 gg | bagb ag d2 | [Fd]2 fg f2 f2 | agfa gf d2 | 
 [G,D] [dg]2 [G,D] [dg]2 [dg]2 | bagb ag d2 | d2 de dcBc | dcBA G2 [G,D]2- | [G,D]2 ab g2 gg | 
 bagb ag (d/c/B) | Affc f2 f2 | agfa gfdB | G [Ge]2 G [Ge]2 [Ge]2 | F[Fd]FF [Fd]2 cd | ecAc ecAF | 
 [FB]2 d2 [FB]2 ||  