Create music using the given musical theme and adhere to the outlined letter-based structure.
X:1
L:1/8
M:2/2
K:D
['cB B2', 'cB B2', '', 'cBAB E3 F GFGA cB B2 c2', 'efdc d2 Bd ABde :|2 E3 F']  
X:1
L:1/8
M:2/2
K:D
 F3 E FEDF | A3 B AGFA | dFAd FAdA | cB B2 cB B2 | E3 D EFGA | cE E2 c2 cB | A2 cB AGFE |1 
 cdBc ABGA :|2 D2 CE D4 |: f3 e fedf | edce dAFA | dFAd FAdA | cB B2 cB B2 |1 g3 f gfeg | 
 fedf edcB | ABcd edcB | cdBc ABGA :|2 E3 D EFGA | cE E2 c2 cB | A2 cB AGFE | D2 CE D4 || 
"^variations" |: F3 E FEDF | A2 GB AGFA | dFAd FAdA | cBAB cBAB | E3 F GFGA | cB B2 c2 cB |1 
 ABcB AGFE | DABG ABGA :|2 A2 ed cABc | dfec d2 de |: f3 e fedf | edce d2 (3ABc | dFAd FAdA | 
 cBAB cBAB |1 g3 f gfeg | fedf edcB | ABcd efdc | d2 Bd ABde :|2 E3 F GFGA | cB B2 c2 cB | 
 A2 ed cABc | dfec d2 AG ||  