Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
Q:1/4=220
M:4/4
K:G
['BGBd efge dBAG', 'gage d2 Bd', 'B2 AG'  
X:1
L:1/8
Q:1/4=220
M:4/4
K:G
 BA | G3 A BGBd | efge dBAG | EAAG ABAG | EAAG AcBA | G2 GA BGBd | efge dBAG | EGGF GAGE | 
 DGGF G2 :| ga | b3 g a3 f | gage d2 Bd | eaag abag | eaag a2 ga | b2 bg a2 af | gage d2 Bd | 
 eggf gage | dggf g2 :| cd | e3 c d3 B | c3 A B2 AG | EAAG ABAG | EAAG ABcd | e2 ec d2 dB | 
 c2 cA B2 AG | EGGF GAGE | DGGF G2 :|  