Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
Q:1/4=120
M:3/4
K:Amix
['ce a2 a2 gf', 'Ac e2 e2']  
X:1
L:1/8
Q:1/4=120
M:3/4
K:Amix
"^Very Slow" ce a2 a2 | gf fe A2 | ce a2 a2 | gf e4 | fa c2 ed | cA B2 ce | fa fe Ac | B2 A4 :: 
 Ac e2 e2 | fa fe cB | Ac e2 e2 | fe a4 | ga c2 ed | cA B2 ce | fa fe Ac | B2 A4 :|  