Dialog - Color Changing

string Msg1;
string Msg2;
list Colors1;
list Colors2;
vector red = <1,0, 0>;
vector blue = <0,0,1>;
vector green = <0,1,0>;
vector white = <1, 1, 1>;
vector black = <0, 0, 0>;
integer gChannelDialog;
key User;



default
{
    state_entry()
    {
        gChannelDialog = -1305;

        llSetColor(white, ALL_SIDES);

        // set the list of buttons for each page.
        Colors1 = ["Red", "Blue", "Green", "Next"];
        Colors2 = ["black", "white", "Back"];

        User = llDetectedKey(0);
        Msg1 = "\n Select a Color";
        Msg2 ="\n Select Black or White";
    }

    touch_start (integer total_number)
    {
        llDialog (User, Msg1, Colors1, gChannelDialog);
        llListen(gChannelDialog,"", User, "");
    }
 listen (integer channel, string name, key id, string message)
 {
    if (message == "Next")
    {
      llDialog(User, Msg2, Colors2, gChannelDialog);
    }

    else if (message == "Red")
    {
        llSetColor(red, ALL_SIDES);
    }
    else if (message == "Blue")
    {
        llSetColor(blue, ALL_SIDES);
    }
    else if (message == "Green")
    {
        llSetColor(green, ALL_SIDES);
    }
     else if (message == "White")
    {
        llSetColor(white, ALL_SIDES);
    }
     else if (message == "Black")
    {
        llSetColor(black, ALL_SIDES);
    }
     else if (message == "Back")
    {
        llDialog (User, Msg1, Colors1, gChannelDialog);
    }
}
}