Produce music using the specified musical structure depicted in letters along with the provided musical theme.
X:1
L:1/8
M:2/2
K:G
["f gbgb afdf gece dBGB cedf ec'bg", "G2 ef gdgd BGBd ecGc ecfe c'abg"]  
X:1
L:1/8
M:2/2
K:G
 f | gbgb afdf | gece dBGB | cedf ec'bg | fgaf f2 ed | gd d2 ad d2 | gdc'd d'deg | egce dcBA | 
 G2 G2 G2 :: ef | gdgd BGBd | ecGc ecfe | c'abg afge | fgae d2 dc | Bg g2 ca a2 | db b2 ec' c'2 | 
 d'bgb ec'af | g2 g2 g2 :|  