Develop a musical piece that combines the given theme and letter-structured outline.
X:1
L:1/8
M:4/4
K:G
['F2 E2 D2- DA AA BA', 'F A A2 d2 A2- AF GA']  
X:1
L:1/8
M:4/4
K:G
 F | F2 E2 D2- DA | AA BA AG FF | F2 E2 D2- DA | AA BA AG F :: A | A2 d2 A2- AF | GA FE E2- EF | 
 F2 A2 F2- FD | EF ED D3 :|  