Design a music composition that employs the provided motif and follows the predetermined musical form.
X:1
L:1/4
Q:1/4=126
M:3/4
K:G
['', 'G2 D', 'A G'  
X:1
L:1/4
Q:1/4=126
M:3/4
K:G
 D |:"^A part" G2 D | G2 D | F E D | C3 | F E D | C B, A, | G, B, C | D2 D | G2 D | G2 D | F E D | 
 C3 | F E D | C B, A, | G, B, D |1 G2 D :|2 G2 D |:"^B part" B A G | B A G | A G F | E3 | A G F | 
 C B, A, | G, B, C | D2 D | B A G | B A G | A G F | E3 | F E D | C B, A, | G, B, D |1 G2 D :|2 
 G3 |]  