Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/4
Q:1/2=120
M:2/2
K:G
['d e']  
X:1
L:1/4
Q:1/2=120
M:2/2
K:G
"G" B e- e e- | e d B2 | G4- | G4 |"D" E =F- F ^F- | F A f2 | e4- | e d e =f |"D7" ^f4 | e3 E | 
 d4 | c3 _B |"G" =B d _B =B- | B d- d _B |"G" =B d _B =B- | B d _d c |"G" B e- e e- | e d B2 | 
 G4- | G4 |"D" E =F- F ^F- | F A f2 | e4- | e d e =f |"D7" ^f4 | e4 | d e f d | e f3 | d e f d | 
 e d e2 |"G" g4- | g4 |]  