How can you get a black lion variant on Zoo Tycoon 1

first delete all your zoos you made then log of the zoo tycoon account then make a new zoo tycoon zoo and add about 200 lions then log off again and go back on the zoo tycoon and keep buying more lions until one goes black or you can download them if you do what i just told you you can get albinos as well. This will work with any animals . I hope this helped guys oh and by the way i am not making it up.