Develop melodies utilizing the stated letter notation and the provided theme.
X:1
L:1/8
M:4/4
K:F
['', 'G F2 FG AFcA BAGA BcdB AGFG', '(f/g/a) gf']  
X:1
L:1/8
M:4/4
K:F
 G |: F2 FG AFcA | BAGA BcdB | AGFG ABcA |1 dfeg fdcA :|2 dfeg f2 f || g | (f/g/a) gf (f/g/a) gf | 
 gfef gabg | (f/g/a) gf dfcf | agfe f2 fg | (f/g/a) gf (f/g/a) gf | gfef gabg | afge fdec | 
 dBcA GABG ||  