Design a musical composition incorporating the alphabetic expression of the chosen structure and the provided melodic theme.
X:1
L:1/8
M:4/4
K:F
['C2 F>GA>F E>FG>E F>GA>F C2', 'F2 G>F E>Gc>=B c2 G>F E>Gc>B c2']  
X:1
L:1/8
M:4/4
K:F
 C2 | F>GA>F E>FG>E | F>GA>F C2 F>E | D>GG>A B>AG>F | E>Gc>=B c2 C2 | F>GA>F E>FG>E | 
 F>GA>F C2 G>F | E>dc>B A>GF>E | F2 F2 F2 || G>F | E>Gc>=B c2 G>F | E>Gc>B c2 B>c | 
 d>ef>e d>c=B>A | G>AG>F G4 | A>BA>G F>A c2 | G>AG>F E>G c2 | c>fe>d c>BA>G | F2 F2 F2 ||  