integer channel=55; // Channel to listen on

default
{
    state_entry()
    {
        llSay(0, "READY");
        llListen(channel, "","","");

    }

    listen(integer channel, string name, key id, string message)
    {
        if (message == "Sky")  // On receiving msg "Sky"...
        {
            llOwnerSay("IP "+(string)llGetPos());
            llSetPos(llGetPos()+<0.0, 0.0, 0.1>); // you can eliminate a global variable
            llOwnerSay("FP "+(string)llGetPos());
        }
    }
}