// SHOWS GAME CENTER ACHIEVEMENTS / LEADERBOARD
// DISPLAYS INFO WHILE TRYING TO CONNECT
function ShowGameCenter( foo )	
	
	local connecting as integer
	
	// create text to show the user that the app is trying to connect to Google Game Center
	connecting 	= CreateText ( "Connecting to Google Game Center........TAP TO ABORT" ) : SetTextSize ( connecting, 4 ) : SetTextAlignment ( connecting, 1 ) : SetTextColor ( connecting, 92, 138, 199, 255 ) : SetTextPosition ( connecting, 50, 0 )
	

	if GetGameCenterExists() = 1	// does device support Google Game Center?
		if GetGameCenterLoggedIn() <> 1 then GameCenterLogin()	 // if still not logged in, try to login now. First login attempt should be made when app is launched
	else
		DeleteText ( connecting )	// device doesn't support Google Game Center, so delete info text and exit function
		exitfunction
	endif		

	
	repeat
		sync()	
	until GetGameCenterLoggedIn() = 1 or GetPointerReleased()	// wait until user is logged in or user taps screen
	
	
	if GetGameCenterLoggedIn()	// if user is logged in, show leaderboard or achievements, depending on the value that has been passed to this function
		if foo = 1 then GameCenterShowLeaderBoard ( "<szBoardID>" )	// <szBoardID> = name of the leaderboard in your Google Play Console
		if foo = 2 then GameCenterAchievementsShow()
	endif
		 	

	DeleteText ( connecting )	// at this point, user has closed leaderboard / achievements, so it's safe to delete the info text and jump back
			
endfunction