Uno Wifi Rev2 - sending program via WIFI

Hardware Arduino WiFi Rev2
1

Hey boys. My new Uno wifi rev2 just arrived and I have one problem. At the beggining I connected my board via USB and tested with example blink program from WifiNiNA and It worked fine. When program is runned and I plug in DC power suply and take off USB, my program is still working. And here is my problem. I'm wondering how I can send program/sketch to my arduino without usb just through WIFI. Is it possible? How I can do it?
Another thing is how i can program built-in RGB led? Which pins should I turn on?

Greetings.

2

It appears the claim that code can be uploaded "over the air" (OTA) has been removed from the Arduino Uno WiFi Rev2's documentation:

As far as the internal LED (not RGB to my knowledge), here's a quick code block to make it blink! (Pin 13 is connected to the internal LED)

void setup() {
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, HIGH);   
  delay(1000);              
  digitalWrite(13, LOW);   
  delay(1000);             
}