Can we use computer coding activity as a kasina object?

Anything we do mindfully can cause a meditative experience. I am a software developer and sometimes when I am engrossed I don't feel the 'I', some kind of '***annatta***' experience. Reaching somekind of Zen experience. I want to ask can we use this activity of programming computers as **a kasina and achieve some jhana state**? **How do I go about it**? Also, is my understanding of what kasina is correct?