Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/16
Q:1/4=120
M:4/4
K:D
['AG F2A2A2B2 d2>e2d2c2 TB2>A2B2d2 e2>f2e2E2 F2A2A2B2 Td2>e2{de}', 'f2a2 d2fg agfg']  
X:1
L:1/16
Q:1/4=120
M:4/4
K:D
 AG | F2A2A2B2 d2>e2d2c2 | TB2>A2B2d2 e2>f2e2E2 | F2A2A2B2 Td2>e2{de} f2>e2 | edcB ABdF TE4 D2 || 
 ag | f2a2 d2fg agfg a4 | g2b2 e2ga baga b2ag | f2a2 d2fg agfg a2fd | A2>d2f2>d2 Te4{de} d2ag | 
 f2a2 d2fg agfg a4 | g2b2 e2ga baga b3a/g/ | f2<a2 e2<f2 Td3c/B/ A2b2 | 
 a2>d'2 A>df>d (Te4{de)} !fermata!d2 |]  