Develop a piece of music conforming to the stated structure and theme.
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
['G2 (c/B/A/G/)', 'Ec (c/B/)(A/G/)', 'FD (g/f/)(e/f/) gG (cB) cABd FA'  
X:1
L:1/8
Q:1/2=80
M:4/4
K:G
"_No key or time signature" G2 (c/B/)(A/G/) (BdcB) | G2 (c/B/A/G/) FA FD | G2 (c/B/A/G/) Bd (cB) | 
 cA Bd FA FD ::"^1st" Ec (c/B/)(A/G/) Ec B2 | Ec (c/B/)(A/G/) FA FD | Ec (c/B/)(A/G/) Ec (cB) | 
 cA Bd FA FD ::"^2nd" (g/f/)(e/f/) gG (Bd"^tr" cB) | (g/f/)(e/f/) gG FA FD | 
 (g/f/)(e/f/) gG Bd"^tr" (cB) | cABd FA FD ::  