Create musical pieces following the given structure and incorporating the suggested musical theme.
X:1
L:1/8
M:2/2
K:D
['d2 FB AFEF D2 dc BABc dF', 'D4 d2 (3fed egfd A2 (3cBA eAcA', 'AFEF D2 dc BABc dF F2 AF', 'fd A2 cA eAcA defg a2 ab'  
X:1
L:1/8
M:2/2
K:D
 d2 FB AFEF | D2 dc BABc | dF F2 dFAF | GBAF Dgfe | d2 FB AFEF | D2 dc BABc | dF F2 AF F2 | 
 GBAF D4 |: d2 (3fed egfd | A2 (3cBA eAcA | defg a3 b | afeg fddc ::"^variations" d2 FB AFEF | 
 D2 dc BABc | dF F2 AF F2 | GBAF D2 (3gfe | d2 FB AFEF | D2 dc BABc | dF F2 AF F2 | GBAF D4 |: 
 defd (3efg fd | A2 cA eAcA | defg a2 ab | afeg fddc :|  