Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/16
M:2/4
K:G
['DGG2 GBB2 Bdd2 GFG2 Acc2', 'EGc2 cEG2 Gce2 eGc2 Bcdc']  
X:1
L:1/16
M:2/4
K:G
"G" DGG2 GBB2 | Bdd2 GFG2 |"D7" Acc2 FEF2 |"G" GBB2 D^CD2 | DGG2 GBB2 | Bdd2 GFG2 | 
"D7" Acc2 D^CD2 |"G" G2G2 G2 z2 ::[K:D]"D" B2>A2 B2>A2 | A2f2 fed2 |"A7" c2>B2 A2>G2 | 
"D" B2>A2 F2>D2 | B2>A2 B2>A2 | A2f2 fed2 |"A7" c2>B2 AGFE |"D" D2D2"_>Teil A" D2 z2 :: 
[K:C]"C" EGc2 cEG2 | Gce2 eGc2 |"G7" Bcdc BAGF |"C" EFAG E4 | EGc2 cEG2 | Gce2 eGc2 | 
"G7" Bcdc BGAB |"C" c2c2 c2 z2 :|  