Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:4/4
K:Amix
['cAef aecA', 'cAeA fAed'  
X:1
L:1/8
M:4/4
K:Amix
 a | cAef aecA | cAef a2 ga | cAef aecA | BGGB g2 e :| a | cAeA fAed | cAAe a2 ga | cAeA fAed | 
 BGGB g2 ea | cAeA fAed | cAAe a2 ga | cAeg fdec | dBGB g2 e ||  