How to change the login-file?

So, i’ve created a localhosted CPPS, and i want to modify the SWF same like the pic given below. Where can i find the file?

bandicam 2020-05-14 19-47-44-461

Were you the one who made the image or found it in some CPPS?
If you found it on a CPPS that is online, send me the link.