Creating Options Page plugin question

Hi,

I want to make an Options page for my plugin. I want to use this code as a start: https://codex.www.ads-software.com/Creating_Options_Pages#Example_.232

Everything works as shown below the code on the page, but I want to add a second setting. I have been puzzling for half a day now, but no luck. Could someone help me out please?

Thanks
Wendi