I am trying to find out a way to write an external script that will run on my computer and preform a specific action. The script needs to access my google chrome, a specific tab, and check the code of the website for a button property change. Ones the button's property changes i want the script to press the button. I am sure that the detection itself is easy, I'm just not sure how to write an external scrip that will access Chrome.
If you want an outside code to do things for you (read, automate), and you are trying to do it on a website, I suggest looking into Selenium.