Compose a song based on the given alphabetical pattern and musical motif.
X:1
L:1/4
M:3/4
K:Bb
['F B', 'F B']  
X:1
L:1/4
M:3/4
K:Bb
 F | F B F |"^(a)" B B F | G B G | F2 F | B c d | f e d | c3- | c2 d | f c d | e e f | d B c | 
 F2 F | B d f | e c A | B2 || F | F B F |"^(a) var." B2 F | G B G | F2 F | B c d | f e d | c3- | 
 c2 d | f c d | e e f | d B c | F2 F | B d f | e c A | B2 |]  