Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:2/2
K:G
['BG (3GGG G2', '(3ddd d2'  
X:1
L:1/8
M:2/2
K:G
 Dc | BG (3GGG G2 G2 | BGBd gdec | BG (3GGG G2 cB | AGFG ABcA | BG (3GGG G2 G2 | BGBd g2 fg | 
 afge fdec | AGFG ABcA || Bd (3ddd d2 dc | BGBd gdec | Be (3ddd d2 cB | AGFG ABcA | 
 Bd (3ddd d2 dc | BGBd g2 fg | afge fdec | AGFG ABcA ||  