Use of Relative coordinate system in 3d Drafting

Before you draw a 3d drawing ucs (user coordinate system icon) will be at this position(just in x and y coordinates)

Then Click on the SE (South East) Icon placed on the view tool bar. After clicking the SE tab your UCS will show 3 Coordinates (X,Y and Z) shown in blew figure.

Now follow the below mentioned instructions and draw a 3d drawing in autocad.
Step by Step instructions.
L enter and click on any point at the drawing area.

1. @ 150 , 0 , 0 
2. @ 0 , 250 , 0
3. @ -150 , 0 , 0
4. @ 0, -250, 0
5. @ 0 , 0, 350 
6. @ 0 , 250 , 0
7. @ 0 , 0 , -350
8. @ 150 , 0 , 0
9. @ 0 , 0 , 50
10. @ 0 , -250 , 0
11. @ 0 , 0 , -50       Return back by writing   @ 0 , 0 , 50
12. @ -100 , 0 , 0
13. @ 0 , 0 , 300
14.  @ -50 , 0 , 0       Return back    @ 50 , 0 , 0
15. @ 100 , 250 , 0
16. @ -150 , 0 , 0      Return back    @ 150 , 0 , 0
17. @ 0 , 0 , -300
18.  @ -100 , -250 ,  0