Craft a piece of music that integrates both the suggested theme and letter-based structure.
X:1
L:1/8
M:6/8
K:F
['G2 z A2']  
X:1
L:1/8
M:6/8
K:F
 A2 Ac>BA | G2 G G3 | A2 ABcd | d3 c2 z | c2 B A2 A | A2 G F3 | F2 FFGA | B2 A G2 z | A2 Ac>BA | 
 A3 G2 z | A2 c d2 d | cde f3 | f2 d c2 A | G>AG F2 z |]  