Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:4/4
K:G
['GABG AD D/D/D GBAB', 'gfgb afdg e/f/g'  
X:1
L:1/8
M:4/4
K:G
 B2 BG AD D2 | GABG AD D/D/D | GBAB G/A/G ge | dBAc BGGA | B2 BG ADDD | GABG AD D/D/D | 
 GBAB G2 ge | dBAc BG G2 || gfgb afdg | e/f/g dg egdf | gfgb afdg | e/f/g af g3 d | gfgb afdg | 
 e/f/g dg egdf | gfgb a2 ag | fgaf gedc ||  