Create compositions following the given structural principles.
Only One Section  
X:1
L:1/8
Q:1/2=100
M:2/2
K:Dmin
 DEFG A2 D2 | FED^C | D4 | DEFG A2 d2 | ^c2 d2 e4 | f2 ef g2 fe | f2 ed ^c2 =Bc | d2 A2 BAGF | 
 E4 D4 |:  