Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
['G(3E/G/B/ ed .d.c.A>.G', "fe d{c'}b/>^a/ bd .c{b}a/>^g/ .a.c B{a}.g/>.f/ .g.d", 'z .G.c.e (3.G/.c/.e/ .g.f.d.B .G.B.d (3.G/.B/.d/ .a.g.e.c'  
X:1
L:1/8
Q:1/4=100
M:2/4
K:G
 G(3E/G/B/ ed | .d.c.A>.G | .F.A.c.f | .a.g.d.B | G(3E/G/B/ ed | .d.c.A>.G | FAcf | 
 .g.d.g z"^Fine" :: !fermata!e(3g/a/g/ fe | d{c'}b/>^a/ bd | .c{b}a/>^g/ .a.c | B{a}.g/>.f/ .g.d | 
 e(3g/a/g/ .f.e | d{c'} b/>^a/ bd | c(3A/c/e/ ba | dAd z :| .G.c.e (3.G/.c/.e/ | .g.f.d.B | 
 .G.B.d (3.G/.B/.d/ | .a.g.e.c | EGc (3E/G/c/ | .e.d.A.F | G(3F/G/B/ .e.d | .c.G.c |]  