Develop melodies adhering to the specified musical structure and using the offered theme.
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
['BABc BFdc', 'BABc BFdc'  
X:1
L:1/8
Q:1/2=90
M:4/4
K:Bb
 F | BABc BFdc | BABc BFdc | Bcde fdgf | edcB AFGA | BABc BFdc | BABc AFdc | BfdB AFGA | 
 B2 B2 B2 || AB | cBAB cdec | dcBc defd | cBAB cded | cBAG Ffec | BABc BFdc | BABc BFdc | 
 BfdB AFGA | B2 B2 B2 |]  