Weell, basically you want a tube shape. Not sure about blender since I don't use it myself, in max there would even be a premade prim for this sort of shape, but you should learn how to do it either way. The way I would go about it is as such (assuming I only have extrude and scale) First extrude the center of your…
im not exactly sure if i understood your question right, but it seems very simple to me: take a cylinder and put the 3d cursor exactly in the center of it (select all vertices of one loop of the cylinder and hit shift-s, cursor to selected) then select all vertices of the cylinder and hit e for extrude and click with the…