Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:4/4
K:G
['EFGA BEFG F3 E FAF/E/D EGBe cAA/A/A', 'AGFD Bcca gfef ggag beef ggag b3']  
X:1
L:1/8
M:4/4
K:G
 EFGA BEFG | F3 E FAF/E/D | EGBe cAA/A/A | B2 BG F4 | EGBe BccA | B2 Bd dAFG | A3 G FDF/G/A | 
 BEGB AGFD || Bcca gfef | ggag beef | ggag b3 e | gbf/e/d edBG | cBca geed | geae beef | 
 gbfd cAAc | BEGB A4 |]  