local modem = peripheral.find("modem")
modem.open(123)
while true do
modem.transmit(gps.CHANNEL_GPS,123,"PING")
    modem.transmit(gps.CHANNEL_GPS,123,"PING")
    event, side, channel, replyChannel, message, distance = os.pullEvent("modem_message")
    if channel == 123 and replyChannel == gps.CHANNEL_GPS then
        term.clear()
        term.setCursorPos(1,1)
        term.write("GPS Active")
        term.setCursorPos(1,2)
        term.write("X: "..message[1])
        term.setCursorPos(1,3)
        term.write("Y: "..message[2])
        term.setCursorPos(1,4)
        term.write("Z: "..message[3])
    end
end