Develop a musical piece incorporating the designated alphabet-based pattern and the supplied melodic theme.
X:1
L:1/8
Q:1/4=120
M:4/4
K:F
['C>F TG2{FG}', 'Tgf/g/ afd>f']  
X:1
L:1/8
Q:1/4=120
M:4/4
K:F
|:"^Slow." C>F TG2{FG} AFcF | C>F AG/F/ Gdd{e}f | C>F TG2{FG} A>F f>d | cAFC D>F F2 :| 
 cf Tgf/g/ afd>f | c>f ag/f/ dgga | c>f Tgf/g/ afd>f | cAFC D>F F2 | c>f Tgf/g/ afd>f | 
 c>f ag/f/ dgg>a | b>ag>f c>A f>d | c/A/G/F/ D>C DF F2 |]  