Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:2/2
K:G
['GA B2 E2 B3 A G2 FG', 'E2 Bc d2 cB g2 fe dBde'  
X:1
L:1/8
M:2/2
K:G
 GA | B2 E2 B3 A | G2 FG E2 (3DEF | GFGA BABd | e2 AB TA2 GA | B3 d cBAG | A2 B2 Tg3 f | 
 efed B2 (3Bcd e2 E2 E2 :: Bc | d2 cB g2 fe | dBde d2 gf | e3 d efga | b2 e2 e2 dc | B2 g2 dBAG | 
 A2 B2 g3 f | efed BA (3Bcd | e2 E2 E2 :|  