Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['G2 E c2 E']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
"_Key D in MS" B | A2 D FED | A2 G ABc | G2 E c2 E | G2 E c2 E | A2 D FED | A2 G ABc | G2 E c2 E | 
 DED D2 ::  