Develop a musical composition that aligns with the given structural outline and thematic content.
X:1
L:1/8
M:4/4
K:D
['fdfa g/g/g ag'  
X:1
L:1/8
M:4/4
K:D
|:"D" D2 FD GEFE | D/D/D FA d2 ef |"G" geaf fged |"A" cA A/A/A EFGE |"D" D2 FD GEFE | 
 D/D/D FA d2 ef |"G" geaf edcd |1"D" ed d/d/d dBAF :|2"D" edce d3 g |:"D" fdfa g/g/g ag | 
"D" fdfa g/g/g ag | fd"C"=cA"G" BG G/G/G |"A" ABcA"G" dcAg |"D" fdfa g/g/g ag |"D" fdfa g/g/g ag | 
 fd"C"=cA"G" BG G/G/G |1 ABcA d3 g :|2"A" ABcA"D" dBAF || D8 ||  