Craft a musical piece that abides by the prescribed structural guidelines and the given theme.
X:1
L:1/8
M:2/2
K:G
['e2 (3(gfe) Bege defg'  
X:1
L:1/8
M:2/2
K:G
"Em" BE E2 BAFE |"D" D2 (3(FED) ADFD |"Em" BE E2"G" BAFA |1"A" (3(B^cd) eg fded :|2 
"A" (3(B^cd) eg"^(Em)" fd e2 |]"Em" e2 (3(gfe) Bege |"D" defg agfg |"Em" e2 (3(gfe)"G" bege | 
"D" defa geed |"Em" e2 (3(gfe) Bege |"D" defg a2 ga |"G" (3(bag) af gefd |"A" (3(B^cd) eg fd e2 |]  