Emerson Sensi Wi-Fi Smart Thermostat

I have gas heater, ac, and fan motor that pull unwanted air inside my home. It’s a four wire system. Wires color in red, green, yellow and white. I am not by all mean an ac/heating installer. But did some reading and research I managed to get it to work and work with Wi-Fi. Video work on my system only research your before you attempt to do it yourself. As much I knew the red wire are always the POWER Supply. The rest examples, green fan, yellow for heater, and white for AC. Once you remove what go where on your old thermostat you should be able work hour’s. This thermostat model required no C wire due to battery operated.