Craft a musical piece adhering to the specified structure.
'Ternary', 'Sectional: Verse/Chorus/Bridge'  
X:1
L:1/16
M:2/4
K:D
 FG | A2FA d4 | A2FG A4 | B2AG E2E2 | FGAF DEFG | A2FA d4 | A2FG A4 | B2AG E2E2 | FGAF D6 z2 || 
 (3AAA | A2d2 d2e2 | e2f2 f2d2 | D2B2 B2G2 | ^FGAB A2F2 | A2d2 d2e2 | e2f2 f2d2 | d2B2 B2G2 | 
 ^FGAB [DA]2 ||"^Variation 1" Bc | dAcd eAde | fBgf edcB | Adcd edcd | Afed cABc | dAcd eAde | 
 fBgf edcB | A[da]cge cABc | d2f2d2 ||  