Develop harmonious melodies based on the provided chord structures.
'F', 'C7', 'F', 'C7', 'F', 'F'  
X:1
L:1/8
M:3/4
K:F
 C DE |:"F" (F2 A).C .F.A |"C7" (E2 G).C .E.G |"_b" (B2"_d" d)"_g".G"_b" .B.d |"F" (A2 c).F .A.c | 
 (f2 a).c .f.a |"C7" (e2 g).c .e.g |"_b" (b2"_d" d')"_e".e"_b" .b"_e =" .e |1"F" f2 z C DE :|2 
"F" f2 z2 z2 |]  