The question at the expense of the text

Hello. Do not tell me whether there is any information about the event that is used in this type constructor wiki on it just some features I do not understand. And I would like to ask how to do more so that would be when you click on a certain object to the text adds 1 value. For example: Money 0 I press on the button changes 0 to 1, and so on

Hi, … evariables
(especially the “Store an amount” part)