Craft a musical piece in accordance with the designated structure and theme.
X:1
L:1/8
M:6/8
K:G
['G2 .d (B/', 'B (c2 A) (F2 D) B3/2 A/', 'e3) (B c d e3)'  
X:1
L:1/8
M:6/8
K:G
 G2 .d (B/ G3) B | c2 A (F2 D) | B3/2 A/ G E2 D | DEF G3 ||"^No. I twice" G2 .d (B/ G3) B | 
 (c2 A) (F2 D) | B3/2 A/ G E2 D | D E F G3"^Twice through" :|"^No. II twice" ((B c d) e3) | 
 (B c d e3) | (B c d e3) | (B c d e3) !fermata!g2 d2 (B/ G3) B | (c2 B) (F2 D) | B3 A/ G E2 D | 
 D E F G3 :|  