Compose music by following the designated structure and integrating the suggested musical idea.
X:1
L:1/8
M:3/4
K:Bb
['fg f2 d2 B2 F3 G FE', '(3[FB]2 [GB]2 [FB]2 D2 F2 [DB]2 [DB]3'  
X:1
L:1/8
M:3/4
K:Bb
 fg | f2 d2 B2 | F3 G FE | D2 F2 B2 | d3 B cd | ed ed cB | A3 F Ac | gf =eg f=e | f4 fg | 
 f2 d2 B2 | F3 G FE | D2 F2 B2 | d3 B cd | ed ed cB | A3 F Ac | ec AF Ac | B4 :: 
 (3[FB]2 [GB]2 [FB]2 | D2 F2 [DB]2 | [DB]3 [DB] [DB][Ec] | [Fd]2 [Fd]2 [Ec]2 | 
 [DB]4 (3[Bg]2 [Ba]2 [Bg]2 | [Bg]2 [Af]3 [Ag] | [Af]4 (3[Ec]2 [Ed]2 [Ec]2 | [Ec]2 [DB]3 [DA] | 
 [DB]4 (3[FB]2 [GB]2 [FB]2 | D2 F2 [DB]2 | [DB]3 [DB] [DB][Ec] | [Fd]2 [Fd]2 [Ec]2 | 
 [DB]4 (3[Bg]2 [Ba]2 [Bg]2 | [Bg]2 [Af]3 [Ag] | [Af]4 (3[Ec]2 [Ed]2 [Ec]2 | [Ec]2 [DB]3 [DA] | 
 [DB]4 :|  