Create musical pieces following the given structure and incorporating the suggested musical concept.
X:1
L:1/8
M:2/4
K:D
['ag f/e/ d'  
X:1
L:1/8
M:2/4
K:D
|:"D" ag f/e/ d |"Em" Bg Bg |"D" ag f/e/ d |"A7" B/A/B/c/"D" A2 |"D" ag f/e/ d |"Em" Bg Bg | 
"A" ac e/c/B/A/ |"G" Bc"D" d2 ::"D" DF Ad |"G" B2 BB |"D" AB AF |"A" E3 E |"D" DF Ad | 
"G" B B/A/ Bd |"A" Ac e/c/ A |"A7" B/A/B/c/"D" d2 :|  