Develop a composition by incorporating elements from the given melodic structure.
Only One Section  
X:1
L:1/8
Q:1/4=115
M:2/4
K:D
|: DF/A/ df | ba ef | ag Bc |{c} ed A2 | DF/A/ df | ba ef | ag Bc | cd d2 |[K:A] ef ec | 
 A/c/e/a/ c'2 |{c'} bd' fg | ac' e2 | ef ec | A/c/e/a/ c'2 |{c'} bd' fg | ga [ca]2 :|  