Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
['c caa egf', 'c2 B', 'A d3 f3']  
X:1
L:1/8
Q:3/8=100
M:6/8
K:F
 c | caa egf | (c3 B2) d | (c2 A) c2 A | c2 B G2 c | caa egf | d3 dcB | Acc BGE | G3 F2!fine! :| 
 A | BGE c2 B | Acf a2 f | bge c2 B | Adc c2 B | BGE c2 B | Acf a2 f | egb bge | (g3 f2) || A | 
 d3 f3 | e3 ge^c | dfa bge | (d3{ed} ^c2) A | d3 f3 | B3 (e2 g) | f2 d e2 ^c | d3 d2!D.C.! |]  