Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:2/4
K:G
['Bd G>A']  
X:1
L:1/8
M:2/4
K:G
"G" Bd G>A | Bd ed | Bd G>A |"C" BA"D" A2 |"G" Bd G>A | Bd ed |"C" e2 ed |"D" ef"G" g2 :| 
"G" gd"C" ed |"G" gd"C" ed |"G" Bd G>A |"C" BA"D" A2 |"G" gd"C" ed |"G" gd"C" ed |"G" Bd"C" ef | 
"D" ag"G" g2 :|  