Develop a musical composition that includes the supplied motif while following the designated alphabetical pattern.
X:1
L:1/8
M:2/4
K:D
['Dd Af', 'ea ec e/d/c/B/ cE']  
X:1
L:1/8
M:2/4
K:D
 Dd Af | Dd Af | fd/e/ fa | g/f/e/d/ e/c/A | Dd Af | Dd Af | fd/e/ fa | g/e/d/^c/ d z :: 
[K:A] ea ec | e/d/c/B/ cE | d/c/B/^A/ BE | e/c/A/B/ c>d | ea ec | e/d/c/B/ cE | F/D/F G/E/G | 
 Ac A2 :|  