Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:2/4
K:D
['z A/A/ GF E4 z']  
X:1
L:1/8
M:2/4
K:D
 DFG |"D" AA A2 | z A/A/ GF |"A7" E4 | z E F<G |"G" G>G GA | B<B"A7" AG |"D" FD FG | AD/D/ EF | 
"D" AA z2 | z A/A/ GF |"A7" E4 | z EEF |"G" G>G"A7" AG |"D" FD"A7" EE |"D" D4 | z |]  