Craft a music piece according to the prescribed structure and the input theme.
X:1
L:1/8
M:2/2
K:A
['ecec eagf', 'cd edcd e2 fe dcBc d2 ed'  
X:1
L:1/8
M:2/2
K:A
 cd | ecec eagf | ecec eagf | ecec fedc | d2 B2 B2 cd | ecec eagf | ecec eagf | efde cdBc | 
 A2 A2 A2 :: cd | edcd e2 fe | dcBc d2 ed | cAcA dcBA | B2 B2 B2 cd | edcd e2 fe | dcBc d2 ed | 
 cagf edcB | A2 A2 A2 :|  