Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/4
K:G
['DD/D/ ED', 'ef ga b2 :|2 ed ef gg']  
X:1
L:1/8
M:2/4
K:G
"G" DD/D/ ED | DG B2 | DB DB |"D7" dc AF | DD/D/ ED | DF A2 |1 Dc Dc |"G" ed BG :|2 DF/A/ dF | 
"G" GB G z |:"G" dc/d/ ed | g>d Bd | g>f eg |"D7" fd c2 | dc/d/ ed | f>d cd |1 f>d ef | 
"G" ga b2 :|2 ed ef |"G" gg g z |]  