Construct a musical work following the provided guidelines and thematic elements.
X:1
L:1/4
Q:1/4=120
M:4/4
K:G
['B A', 'G A', 'B A'  
X:1
L:1/4
Q:1/4=120
M:4/4
K:G
"^Rather quick" E | G F E F/G/ | B A F !breath!D | A3/2 G/ A B/c/ | d G d z/ A/ | d B G d | 
 c B A D/D/ | G B/d/ E/F/G/A/ | B A G |][M:4/4][K:Dmix] D | F F/E/ F G/A/ | B3/2 A/ F D | 
 A3/2 F/ G A | d d A3/2 A/ | d d F B | A A F/E/D/E/ | F F G A | B A D |] 
[M:4/4][K:Dmix]"^(a)" (3D/E/F/ | G F E F/G/ | B A F !fermata!D | G G G A/B/ | 
 c B !fermata!A (3A/B/c/ |"^(b)" d d G B/d/ | c A F D/D/ | G3/2 F/ E/F/G/A/ | B A !fermata!D |] 
"^(a) var." D ||  