HaxBall | This is a replica of Haxball game made with Unity Engine | Game Engine library

I have a problem with getting elements by their selectors.

A page on which I struggle is: http://html5.haxball.com/. What I have succeded is to log in, but that was kind of a hack, because I used the fact, that the field I need to fill is already selected.

After typing in nick and going into lobby I want to click the button 'Create room'. Its selector: body > div > div > div > div > div.buttons > button:nth-child(3)

I am creating a NBA simulator similar to Haxball, in which each circle should have a user name and be its own thing so that during the running of the program an indiviual circle could have its own attributes changed e.g a player gets slower but not everyone does.

I have used a few lines in the teams class to create the Player and put them in a team1players list. This does work in creating 5 circles all in different co-ords. However I need the playername attribute (from the Player class) to change for each circle as only certain players play certain positions. I have tried to use self.composition in the for loop but it wont allow me to use a dictionary as an int. I need each player created to be a different playername - with the playername deriving from the composition dictionary containing all positions. So far I have added 1 name (Jose Calderon) to the point guard slot in the composition and I have tried to use the point guard list in the creation of the circle however this results in all players being named Jose Calderon as opposed to just team1players[0] (being the point guard) called Jose.

Below is the section of code I need help with - there is plenty of other flaws but this is a basic prototype: