Create a composition following the given musical structure and theme.
X:1
L:1/16
M:2/4
K:Bb
['(=ef).d.B cABG AFF_A GEBG', 'ab=ef ^fgd_e'  
X:1
L:1/16
M:2/4
K:Bb
 F | B2 .b.f (=ef).d.B | cABG AFF_A | GEBG FB,DF | ECFE DB,B,F | B2 bf (=ef).d.B | cABG AFF_A | 
 GEBG FBdf | ecfe dBB || b | ab=ef ^fgd_e | =efAB dccb | ab=ef ^fgd_e | =ef_ec dB.B.b | 
 ab^fg deag | (=efb)B dccd | Bd2 FB GBeg | =efga dBB ||  