Imprint

Imprint 

1. Extrude objects (i.e. walls) to create a solid object.
2. Change the UCS and draw an object on a face of one of the walls.
3. Choose Modify, Solids Editing, Imprint.
2. Select a 3D solid: pick solid
3. Select an object to imprint: pick circle
4. Delete the source object <N>: y