I often wonder and picture my next project would be. But before I do that, I wanted to ask, how do you make a building produce you gold? Here's my question: 1. How to build a building that gives me 20 gold income every 20 seconds 2. So it gives me 20 gold per 20 seconds, here's my second question. When I upgraded the building. It should change the gold income per second from 20 to 30. How to do that? If this is very easy for you. Just give me the answers and... Thank you for taking time to read my thread.