Produce a music piece that aligns with the mentioned musical structure and theme.
X:1
L:1/8
Q:1/4=60
M:2/4
K:D
['z z D,F,G, F,E,F,D,', 'z G,G,,'  
X:1
L:1/8
Q:1/4=60
M:2/4
K:D
 z | z D,F,G, | F,E,F,D, | C,D,E,F, | z G,G,, z | z D,F,G, | F,E,F,D, | G,F,E,A, | DA,D, :| z | 
 G,G,, F,D, | E,E,, D,B,, | C,D,E,F, | z G,G,, z | z D,F,G, | F,E,F,D, | G,F,E,A, | DA,D, :|  