Invent engaging chord sequences that bolster the harmony of the existing music.
z3 c | c2 d2 | cG BA | G F3- | F2 z f | e2 GA | BA/B/ dc | A4 |: z f f_e | 
 d3 f | gf ed | fc AB | [cc]=B/c/ dc | e G2 A | Bc de | f4 :|  
X:1
L:1/8
M:2/4
K:F
 z3 c |"F" c2"Bb" d2 |"C7" cG BA |"F" G F3- | F2 z f |"C7" e2 GA | BA/B/ dc |"F" A4 |: z f f_e | 
"Bb" d3 f | gf ed |"F" fc AB | [cc]=B/c/ dc |"C7" e G2 A | Bc de |"F" f4 :|  