two arduinos communicating together??

[system]

anthony8i:
ok so how can I write a sketch that; say I have led13 on and on my main arduino and second arduino reads if its on or off? or how can I turn the ledpin13 on or of using a switch? gives 1 or 0 on my monitor and the second arduino reads that?

Have you got the switch turning on and off the LED on the first (main) Arduino yet? If not, that is your starting point.

File -> Examples -> Digital -> Button

Get that working.

Yeah I got all that working.. But really need help with a sketch? I need 4 LEDs light up with a switch, send that data to 2nd arduino to mirror that same data? Don't know how or where to really begin on how write the two sketches to upload to the arduinos? Thanks