Develop a musical piece using the given theme and incorporating the letter-based structure provided.
X:1
L:1/8
M:3/4
K:Amin
['|{e} .d2', 'B2 c4 d2 e2 fedc |{c} d2']  
X:1
L:1/8
M:3/4
K:Amin
 edcdec | A2 a2 g2 | Tfedefg |{f} e4 fe |{e} .d2 (ed)(cB) |{B} c2 (dc)(BA) |{c} B2 A2 ^G2 | 
{^G} A6 :| .G2 cGec |{e} d2 cBAG | G2 dBfd | d2 e4 f2 | .g2 aefg |{g} f4 e2 |{e} .d2 c2 B2 | 
{B} c4 d2 | e2 fedc |{c} d2 Bc d2 | .d2 edcB |{B} c2 AB c2 | .BcdcBA | ^G2 A2 a2 | .c2 dcBc | A6 ||  