Hi Laura, Can you provide some more context by pasting code for how you expect both your UI and calculation methods to interact? What is the application?cheers -benOn Wed, Jan 28, 2015 at 5:49 AM, Laura Risani <laura.risani@gmail.com> wrote:Hi all,Thank you for your answers.But i yet can't see how to implement the method i wanted, because #fork schedules the process and immediately returns but i'd like to wait and only then return the answer.Best,LauraOn Tue, Jan 27, 2015 at 3:46 PM, Laura Risani <laura.risani@gmail.com> wrote:Hi all,I need an object/method like this oneWaiting>> wait : seconds"i take the flow control during 'seconds' without halting image morphs stepping/handling (as Delay>>wait: does) and then return to the sender "How can i��implement it?Where can i borrow for reuse an existing one from?Best,Laura