Assemble a musical composition that combines the featured motif and conforms to the defined alphabetical form.
X:1
L:1/16
M:4/4
K:D
['AAAA AAAA', 'AAAA AAAA']  
X:1
L:1/16
M:4/4
K:D
|: DDDD DDDD DDDD DDDD | DDDD DDDD AAAA AAAA | AAAA AAAA AAAA AAAA | AAAA AAAA DDDD DDDD | 
 DDDD DDDD DDDD DDDD | DDDD DDDD AAAA AAAA | AAAA AAAA AAAA AAAA | AAAA AAAA D4 D4 :: 
 AAAA AAAA AAAA AAAA | BBBB BBBB BBBB BBBB | cccc cccc cccc cccc | dddd dddd dddd dddd | 
 AAAA AAAA AAAA AAAA | BBBB BBBB BBBB BBBB | cccc cccc cccc cccc | d4 d4 :|  