Create harmonious melodies following the given letter notation and incorporating the designated theme.
X:1
L:1/8
M:8/8
K:F
['C2 C2 F4 C3 F2 FFF C2', 'C2 C2']  
X:1
L:1/8
M:8/8
K:F
 C2 C2 F4 | C3 F2 FFF | C2 C2 F4 |: F_GAAAAGF | FBBBBBA_G | FcccccBA | Bc_dcd/e/dcB | 
 ABcBc/_d/cBA | _GABAB/c/BAG | F3 _G2 G3 | F_GFEFGFE | F_GFE F3 ^G | F/G/F/G/FE D4 | 
 E/F/E/F/ED E3 z | FF/F/F_GFE F2 | F_GABcBAG | F_GFEDEFG | E2 _G F2 F F2 | C2 C2 F4 | C3 F2 FFF | 
 C2 C2 F4 | C3 F2 FFF | C2 C2 F4 :|  