1. open a new family as generic model2. save the family3. go to manage and change the units to centimeter4. make 4 reference planes (comand rp) as the picture above5. make the dimensions to your family and then press EQ6. go to the left view and make a reference plane parallel to the reference level

7. on the box family type, go to parameter>add>name the parameter>click on instance>ok. I named then in 

portuguese, sorry about that.

8. comand dimension (di), dimensionate you reference plane to the reference level9. click on the cote, and on label choose the parameter that you create for that cote10. check if the parameter works11. on reference level, name the other cotes according to their parameters as well12. on extrusion, start drawing the object

13. modify/create extrusion>align. To every side of the square, align then to the respective reference plane 

and click on the locker symbol

14. draw a circle at some corner15. copy that circle to the other corners16. comand trim, cut the parts of the circles thata are outside the square17. then draw a circle in the middle of the square

18. on annotate, make a radial dimension to the circle and a linear one to the "semi-circles" on the corners, 

conecting their extrem part to the reference plane

19. add new parameters to the radium and label them20. click on the check buton21. test if all the parameters really works22. on the left side, don't forget to align the reference plane to the object and then click on the locker23. create a new "material" parameter, and on the box of type of parameter click on "material"24. on the category, choose the best material that fits your object, upload and rename it25. click on the realistic vision on the box below to see how your object turned out26. create a new project27. load your object into the project28. change the dimensions of this first object acording to the base of the vase

29. on the 3d view, go to the parallel vision and then to the array command. write 20 to the number of 

repetitions of the object and uncheck the group and associate box. Then click on on point of the inferior side 

then at one on the superior side of the object

30. at project units, don't forget to change the units to centimeter

31. start changing the dimension of each one of your objects like these: the extern rays starts at 19cm 

decrease at each object until reach 0.1cm at the top, as the inside ray start as 0.1cm and at the top has 19cm.

   32. the object is ready.