integer channel = 12311;
integer ismessage = 0;
integer channelscan = 20000;
integer i = -20000;
string interuptmsg;

default
{
    touch_start(integer total_number)
    {
        llListen(channel, "", "", "");
    }
    listen(integer channel, string name, key id, string msg)
    {

        if(msg == "Scan Msg")
        {
            for(i = -20000; i < channelscan; i++)
            {
                if(msg == "")
                {
                    ismessage = 0;
                }
                else
                {
                    ismessage = 1;
                }
                llSetText("Scanning channels\n"+(string) i, <1,1,1>, 1);
                if(i == 19999)
                {
                    llSetText("Scanning channels\n Complete", <1,1,1>, 1);
                }

                if(ismessage == 1)
                {
                    llSay(0, (string) name +": "+ (string) msg + " - " + (string) channel);
                }
            }
        }
    }
}