Make a plane and delete 2 vertices. Do not rotate it!
Press W and click on subdivide. Do this 3 times.
Make the figure like the one of fig. 1 (with A to select or deselect al, B for border select and use the red arrow (the X-arrow) to move them to the right position. fig. 1
Go to camera view (NumPad 0) and click 4 times on ‘spin’ (go to editing menu and look below ‘mesh tools’).
Now you just can watch your shaded lamp with the user view. This is what you have… fig. 2
Its my first tutorial so I hope its useful.
fig. 1
fig. 2
