Compose a piece using the alphabetic notation of the assigned musical structure and the provided melodic motif.
X:1
L:1/8
Q:1/2=120
M:2/2
K:Glyd
['', 'dBGB dBGB dBdg f2 df', 'dgBg dgBg']  
X:1
L:1/8
Q:1/2=120
M:2/2
K:Glyd
 Bc || dBGB dBGB | dBdg f2 df | ecAc ecAc | edef gage | dBGB dBGB | dBdg f2 df | afge fdgB | 
 AABd e2 eg || dgBg dgBg | dgBg f2 df | eaca eaca | edef gage | dgBg dgBg | dgBg f2 df | 
 afge fdgB | AABd e2 eg |]  