Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
['G2 BG', 'bggd edcB B2 A2 bgaf gfed egfa'  
X:1
L:1/8
Q:1/2=100
M:4/4
K:G
"^A" G2 BG BddB | cBcd ef g2 | G2 BG Bdge | dcBG A2 G2 |"^B" g2 ag/a/ bggd | edef gdBG"^*" || 
"^C" g2 ag/a/ bggd | edcB B2 A2 |"^D" bgaf gfed | egfa gdBG | GBAc Bdge | dcBG A2 G2 |]  