Construct a melodic piece using the alphabet-based musical sequence and the given motif.
X:1
L:1/8
M:2/2
K:Dmix
['(3ABA GB', 'Adde{g} fedf edce dcAd']  
X:1
L:1/8
M:2/2
K:Dmix
 A2 GB ADDE | FGAB c2 dB | (3ABA GB AGAB | cAGE FEFG | (3ABA GB ADDE | FGAB cAdB | (3ABA GB A3 B | 
 cAGE F3 G || Adde{g} fedf | edce dcAd | Adde{g} fefg | af (3gfe fde^c | Adde{g} fedf | edce dcAd | 
 Adde f3 g | afge fde^c ||"^Bar 1 of the first part after the second part:" dcAG ADDE |]  