Construct a musical piece using the designated motif and sticking to the alphabetical form presented.
X:1
L:1/8
M:2/4
K:G
['dB GA', 'g3 e']  
X:1
L:1/8
M:2/4
K:G
|: Bc | dB GA | B3 c | dB GA | BA A2 | dB GA | B3 c | de dB | AG G2 :: g3 e | f3 de | g3 e | 
 fd de | g3 e | d2 de | de dB | AG G2 :|  