Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/8
M:2/4
K:D
['A/B/A/G/ FA de f2', 'cd ef g4 fa'  
X:1
L:1/8
M:2/4
K:D
|: A/B/A/G/ FA | de f2 | ga/g/ fe | df A2 | A/B/A/G/ FA | de f2 | gg/g/ fe | d4 :: cd ef | g4 | 
 fa fa | g4 | cd ef | g4 | fa ge | d4 :|  