Develop musical pieces that conform to the specified format and include the suggested musical theme.
X:1
L:1/8
M:4/4
K:Dmix
['FGAB cG(3GGG EG (3GGG AAAG FGAB cdeg', '(3ddd fd adfd'  
X:1
L:1/8
M:4/4
K:Dmix
 A2 AG FGAB | cG(3GGG EG (3GGG | AAAG FGAB | cdeg fdec | (3AAAAG FGAB | cG(3GGG EG (3GGG | 
 AAAG FGAB | cdeg fd d2 :| (3ddd fd adfd | (3ccc ec gcec | (3ddd fd adfd | ceag fdec | 
 (3ddd fd adfd | (3ccc ec g2 fg | af (3gfe fdeB | cdeg fdec :|  