Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:2/2
K:Cmin
['G2 F2 F2']  
X:1
L:1/8
M:2/2
K:Cmin
 _B,C | E3 F G2 c2 | _BG=Bc_BGFE | G2 F2 F2 EF | G2 F2 F2 EC | _B,CEF G3 c | _B<GFE F2 G=B | 
 c2 C2 C2 _B,C | E2 C2 C2 _Bc | e3 fefgf | e_BceBGFE | G2 F2 F2 EF | G2 F2 F2 ef | gefge_Bce | 
 _BGFEFGAB | c2 C2 C2 _B,C | E2 C2 C2 |]  