Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:2/2
K:C
['f edcd dGGf edce g2 f>g edcd', 'c2 g>a g>ede c/c/c g>a g2 Tfe']  
X:1
L:1/8
M:2/2
K:C
 f | edcd dGGf | edce g2 f>g | edcd cGGc | A/B/c GE D2 D :| c2 g>a g>ede | c/c/c g>a g2 Tfe | 
 cega gece | f>g a/g/f/e/ d2 de | c2 g>a g>ede | c/c/c g>a g2 Tfe | cega gece | faeg defg ||  