Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:3/4
K:C
['c2 e2', 'a2 c2 a2 bagf'  
X:1
L:1/8
M:3/4
K:C
 G2 | c2 e2 c2 | e2 g2 c2 | Bcdefd | c2 e2 G2 | c2 e2 c2 | e2 g2 c2 | Bcdefd | c4 ::[K:F] ab | 
 a2 c2 a2 | bagf g2 | g2 c2 g2 | agfe f2 | a2 c2 a2 | bagf d'2 | c'abgec | f4 :|  