Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:2/4
K:C
['ee dd cB']  
X:1
L:1/8
M:2/4
K:C
 cd e>f | ec e2 | cc/d/ ef/e/ | dc/B/ cA | cd e>f | ec e2 | cc/d/ ef/e/ | dc/B/ A/B/c/d/ | ee dd | 
 cB A/B/c/d/ | ee dd | cB A2 | ee dd | cB A/B/c/d/ | ee dd | cB A2 |]  