Develop melodic works that adhere to the given chord alterations.
'G', 'D7', 'G', 'D7', 'G'  
X:1
L:1/8
M:2/4
K:G
"G" DD ED | .G2 .G2 | DD ED |"D7" .F2 .F2 | AA AG | GF F2 | FF FE | ED D2 ||"G" DD ED | .G2 .G2 | 
 DD ED |"D7" .F2 .F2 | AA AG | GF FE | DD EF |"G" .G2 .G2 ||  