How to setup Depreciation for Italy

Summary:

We have below requirement in Italy. The Asset should be depreciated in the way mentioned below

- In first year of life basis of depreciation is 50% of cost.

  In the following years basis of depreciation is 100% of cost

Content (required):

Cost 900, life 3 years, DPIS 01.01.XX

First Year depreciation should be 150

Second and third year should be 375 each.

How to achieve this other than changing the asset depreciation percentage after first year by amortizing date and changing the percentage.

My need is to know how to define a depreciation method in such a way than we no need to perform this amortizing asset after first year.