turn on led on one board with pus button on other board using esp8266 and arduino

Hello,

I am completely new to arduino.

I would like to start playing with a beginning sketch, but really i do not know what to do.

Basic, i have two arduino uno boards and on each of them it is attached an ESP8266-01.

Each board has 3 push buttons and 3 leds.

What i want to do is to turn on led 1 on board 2 when i press button 1 on board 1.

The led should stay on as long as i keep pressed the button.

Also, if i press 2 or 3 buttons i want to see the corresponding led on.

Can you help me please.

Attached it is a general schematic.

I can wire it on breadboard and play with it if i have a startup or a piece of code.

Thank you very much.