Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
['FFG B2 B d2 c (B2 F)GGF']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:Bb
 FFG | B2 B d2 c | (B2 F)GGF | G2 F E2 G | F2 FFFG | F3 FFF | G3 GGF | G2 B A2 F | B2 z FGF | G3 :|  