Craft a music piece according to the prescribed structure and the input theme.
X:1
L:1/8
M:4/4
K:G
['g2 (dB) GBdB', '(B,D).G.D (CE).A.E (DF).A.B'  
X:1
L:1/8
M:4/4
K:G
 f | g2 dB GBdB | a2 ec Acea | g2 (dB) GBdB | cedc BG-Gf | g2 (dB) GBdB | a2 (ec) Acea | 
 g2 eg dgBg | cA (d/c/B/A/) BGG || D | (B,D).G.D (CE).A.E | (DF).A.B (cA).B.G | 
 (B,D).G.D (CE).A.E | (DF).A.B (BG).G.D | (B,D).G.D (CE).A.E | (DF).A.B (ce).d.c | 
 (Bd).g.B (ce).a.g | (fd).a.f .g.G.G |]  