Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:A
['A/B/c/d/ ea', 'A/B/c/d/ ec']  
X:1
L:1/8
M:4/4
K:A
 A/B/c/d/ ea ec{e}ca | ec{e}ca Te2 Tc2 | A/B/c/d/ ea ec{e}cg | aB{c}Bc Td2 cB :: A/B/c/d/ ec fdec | 
 A/B/c/d/ ec Td2 cB | A/B/c/d/ ec fdec | fB{c}Bc Td2 cB :|  