Using the provided alphabet sequence and motif, develop a unique musical composition.
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
['f=efg f_edc B2 B2 BABc d2 d2', 'BAcA F2']  
X:1
L:1/8
Q:1/2=100
M:4/4
K:Bb
 f=efg f_edc | B2 B2 BABc | d2 d2 dcde | c2 c2 cde=e | f=efg f_edc | B2 B2 BABc | d2 d2 cBcd | 
 B2 b2"^*" B4S || B2 B2 d3 B | BAcA F2 GA | BABc dcdB | BAcA F2 z2 | fede fgab | fede fgab | 
 f2 d2 cBcd | B2 b2"^*" B4 |]  