Form a musical piece based on the provided motif while observing the defined structure.
X:1
L:1/8
M:4/4
K:D
['dBAB defe', 'Tf2 fe'  
X:1
L:1/8
M:4/4
K:D
 dBAB defe | dBAB e2 e2 | dBAB defe | dcBc A2 A2 | dBAB defe | dB (3BBB e2 e2 | defg afef | 
 dcBc A2 A2 || Tf2 fe Tf2 fe | dB (3BBB e2 e2 | Tf2 fe defe | dcBc A2 A2 | Tf2 fe Tf2 fe | 
 dB (3BBB e2 e2 | defg afef | dcBc A2 A2 ||  