Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
['G2 AG Adde', 'g2 de']  
X:1
L:1/8
Q:1/8=180
M:4/4
K:G
 G2 AG Adde | fdgd fdcA | G2 AG Adde | fdcA GFEF | G2 AG Adde | fdgd fdcA | G2 AG Adde | 
 fdcA AGG || f | g3 f g2 de | fdgd fdcA | (3gag df g2 de | fdcA AGGf | g3 f g2 de | fdgd fdcA | 
 dg g2 bgag | fdcA AG G2 ||  