Create a program that runs once after installation

I am looking to develop an application that can go undetectable when installed that will launch when the computer starts or launches immediately after going through an installation wizard that will Load a website without being visible or seen that will result in a cookie being dropped onto their computer from my referral code. This script would have an algorithm that was able to determine which website to load based on day of the week monday-sunday. Cookies 1 = Cookies 2 = Cookies 3 = Cookies 4 = Cookies 5 = If software was installed on monday cookies 1, 5 run If software was installed on tuesday cookies 2, 3 run if software was installed on Wednesday cookies 4 run If software was installed on Thursday cookies 1, 4 run If software was instaled on Friday cookies 2 run If software was installed on Saturday cookies 3,5 run If software was installed on Sunday cookies 1,2,3,5 run The installer knows that the app will be installed and agrees fully to have it installed so it is in full complicance. Does this sound like something you could do? The idea of this app is to not be known or seen when installed or ran. Let me know if you could do something like this...