Formulate a musical piece by utilizing the specified motif and alphabet-based structure.
X:1
L:1/8
M:6/8
K:D
['DFA B2 A def g2 e fdf', 'agf eg=c eg=c egg gfe fef gfg', 'AFD DFA', 'd2 e']  
X:1
L:1/8
M:6/8
K:D
 DFA B2 A | def g2 e | fdf ecA | BdB AFE | DFA B2 A | def g2 e | fdf ecA |1 Bdc dAF :|2 Bdc d2 e |: 
 fad fad | faa agf | eg=c eg=c | egg gfe | fef gfg | agf efg | fed =cAG |1 Ad^c d2 e :|2 
 Ad^c dAF ||"^variations" |: DFA B2 A | def gfg | fdf ecA | B/c/dB AFD | DFA B2 A | def gfg | 
 faf ecA |1 Bdc d3 :|2 Bdc d2 e |: fad fad | faa agf | eg=c eg=c | egg gfe | f3 gfg | agf efg | 
 fed ^cAG |1 Ad^c d2 e :|2 Ad^c dAF ||  