Need an R Arima example for my software -- 2

Would like to use the ARIMA time series function in my application. The program has an R interface for that, which has already been installed and tested. Now I only need a suitable forecast example, which I can use or adapt.
The example should show the forecast of the next 90 days with the first standard deviation up and down, analogous to the Arima description here:
https://rpubs.com/riazakhan94/arima_with_example

The data is subject to seasonal fluctuations and since I don't want to do my own optimizations, the Auto-Arima function should be used.

A description of the software can be found here:
https://www.quantshare.com/title-495-getting-r-objects-into-quantshare

The interface to R is described here:
https://www.codeproject.com/Articles/25819/The-R-Statistical-Language-and-C-NET-Foundations

The software and interface is not very common and I think it is not so easy to install, so it would be the best do work remote on my computer.
I think for an R-Expert it needs only a few hours to adapt the code to my software.