Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
['DGA B2 G']  
X:1
L:1/8
Q:3/8=120
M:6/8
K:G
|:"^A" d |"C" efg"D" afd |"G" g3 d3 |"C" ecc"G" dBB |"D7" cAA"G" G3 |"G" DGA B2 G |"G" DGA B2 G | 
"G" Bcd"C" c2 B |"D" A3- A2 ::"^B" A |"D" FGA AFD |"D" A3"G" d3 |"D" AFF"A7" GEE | 
"D" D3 z G/A/B/c/ |"G/B" d3 GA/B/c/d/ |"C" e3 AB/c/d/e/ |"D7" f3 Bc/d/e/f/ |"Em" g3"D/F#" d2 c | 
"G" BGG"D7" cAA |"G" G3- G2 :|  