Build a musical arrangement using the indicated alphabet-based system and the given motif.
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
['AF F2', 'fa a2']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:D
 AF F2 AFBF | AF F2 GFEB | AF F2 ABde | fe d2 e2 dB | AF F2 AFBF | AF F2 GFEB | AF F2 ABde | 
 fedf e2 de |] fa a2 fb b2 | fa a2 afde | fa a2 fb b2 | afdf e2 de | fa a2 fb b2 | afde fedB | 
 dBAF ABde | fd d2 e2 dc | d8 |]  