Redpos Send & Receive

rednet.open("top")
x, y, z = gps.locate(2, false)

function send(x1, y1, z1, message)
    return rednet.broadcast(x1.. ":(@!#!):" ..y1.. ":(@!#!):" ..z1.. ":(@!#!):" ..message)
end

function receive( nTimeout )
    local timer = nil
    if nTimeout then
        timer = os.startTimer( nTimeout )
    end
    while true do
        local e, p1, p2, p3 = os.pullEvent()
        if e == "rednet_message" then
            local tWords = {}
            for match in string.gmatch(p2, "[^:(@!#!):\t]+") do
                table.insert( tWords, match )
            end

            if(not tWords[4] == nil)then
                if(tWords[1] == x and tWords[2] == y and tWords[3] == z)then
                    return tWords[1], tWords[2], tWords[3], tWords[4]
                end
            end
        elseif e == "timer" and p1 == timer then
            return nil, nil, nil
        end
    end
end