I used the previous wedge model to make the periscope. Firstly, I duplicated the wedge, rotated the second one to - 90 on the y axis, and changed the sizes in edit mode. Then I joined them and scaled in object mode. I then added the cube and moved the pieces together in edit mode clicking the faces in wireframe mode and joining them so. And lastly, I added color, joined them all together and relocated the base to the x,y, and z axis.
