Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:2/4
K:G
['dB G2 BG', 'G2 efge fgab gfge fd d2 efge'  
X:1
L:1/8
M:2/4
K:G
 g2 dB | G2 BG | E2 GEFD D2 | gg dB | G2 BG | EcAF | G2 G2 :| efge | fgab | gfge | fd d2 | efge | 
 fgaf | bgef | g2 Bd | efge | dBgB | ceBd | AFED | GABG | EGce | dBcA | G2 G2 ||  