Construct a musical piece that follows the designated lettered structure and integrates the provided motif throughout.
X:1
L:1/8
Q:1/4=120
M:6/8
K:Eb
['(.B2 .c)']  
X:1
L:1/8
Q:1/4=120
M:6/8
K:Eb
"^Moderate time" G/A/ | [GB]2 e (e_d).c | (B3 B2) (G/A/) | B2 c dcB | (.c2 .e .e2 .c) | 
 (.B2 .c) (BG).B | (E3 E2) (G/A/) | (.B2 .c) (_dc).B | (.c2 .e .e2 .c) | (.B2 .c) (BG).B | 
 (E3 E2) ||  