Develop tunes following the predetermined chord changes.
'G', 'C', 'Em', 'C', 'G', 'Am', 'G', 'Am', 'G', 'Em', 'G', 'Em', 'C', 'G', 'Am', 'G', 'Am', 'Em', 'D', 'Am', 'G'  
X:1
L:1/8
M:4/4
K:G
 GA |:"G"{A} B2 GE D3 E | G2 AB"C" c3 A |"Em" BA GD"C"{D} E4- | (E6 D)E/F/ | 
"G" G A/G/FG"Am"{G} A A(3BAG GA |"G"{A} B2{=cB} GE D3 E |"Am" G2 (3AGF"G" G4- | G4- G2 ::{A} Bd | 
"Em"{d} e3 d"G" d g3- | (g3 d)"Em" e(3fed B |"C" c3 A"G"{B=c} BAGD |"Am" E4- E2 D E/F/ | 
"G" G A/G/ FG"Am" AB/A/GA |"Em" ABGE"D" D3 E |"Am" G2 (3AGF"G" G4- | G4- G2 :|  