Face expression animations script

It has taken around a one third year since I began to learn LSL who didn't know any program language. I go on much these sample scritpts in this forum. I return a favor even though a little.
This is a face expression animations script. It is used a built-in animatiions.

// Created by Seagel Neville
// Thanks to Catherine Omega, the dialog boxes came to keep showing.
// You can not only just put this script in your attached object, but also
// put into a prim you rez to execute.

integer CHANNEL = 42;   // dialog channel

list MENU_UNHAPPY =     // The limit of dialog is only twelve. So I cannot help
[                       // separating the list.
"disdain", "repulsed", "anger",
"bored", "sad", "cry",
"embarrased", "frawn","shrug",
"afraid", "worry", "surprise"
];

list MENU_HAPPY = 
[
"wink", "toungue out", "kiss", 
"toothesmile", "smile", "laugh",
"open mouth"
];


default {
    state_entry()
    {
        llListen(CHANNEL, "", NULL_KEY, "");
        llRequestPermissions(llGetOwner(), PERMISSION_TRIGGER_ANIMATION);
        llInstantMessage(llGetOwner(), "Just typing \"/42menu\", you can express your emotions");
    }    
    on_rez(integer total_number) 
    {
        llResetScript();
    }
    listen(integer channel, string name, key id, string message) 
    {
        
        if (llListFindList(MENU_UNHAPPY, [message]) != -1)  // verify dialog choice
        {
            if (message == "afraid")
            {
                llStartAnimation("express_afraid_emote");
            }
            if (message == "anger")
            {
                llStartAnimation("express_anger_emote");
            }
            if (message == "bored")
            {
                llStartAnimation("express_bored_emote");
            }
            if (message == "cry")
            {
                llStartAnimation("express_cry_emote");
            }
            if (message == "disdain")
            {
                llStartAnimation("express_disdain");
            }
            if (message == "embarrased")
            {
                llStartAnimation("express_embarrassed_emote");
            }
            if (message == "frawn")
            {
                llStartAnimation("express_frown");
            }
            if (message == "repulsed")
            {
                llStartAnimation("express_repulsed_emote");
            }
            if (message == "sad")
            {
                llStartAnimation("express_sad_emote");
            }
            if (message == "shrug")
            {
                llStartAnimation("express_shrug_emote");
            }
            if (message == "surprise")
            {
                llStartAnimation("express_surprise_emote");
            }
            if (message == "worry")
            {
                llStartAnimation("express_worry_emote");
            }
        llDialog(llGetOwner(), "What do you want to express?", MENU_UNHAPPY, CHANNEL);
        // The dialog box keeps showing until you chose "Ignore".
        }
        if (llListFindList(MENU_HAPPY, [message]) != -1)  // verify dialog choice
        {          
            if (message == "kiss")
            {
                llStartAnimation("express_kiss");
            }
            if (message == "laugh")
            {
                llStartAnimation("express_laugh_emote");
            }
            if (message == "open mouth")
            {
                llStartAnimation("express_open_mouth");
            }
            if (message == "smile")
            {
                llStartAnimation("express_smile");
            }
            
            if (message == "toungue out")
            {
                llStartAnimation("express_tongue_out");
            }
            if (message == "toothesmile")
            {
                llStartAnimation("express_toothsmile");
            }
            if (message == "wink")
            {
                llStartAnimation("express_wink_emote");
            }
        llDialog(llGetOwner(), "What do you want to express?", MENU_HAPPY, CHANNEL);
        // The dialog box keeps showing until you chose "Ignore".
        }
        else if (message == "menu")
        //If you cleard the dialog boxes, you could recall them by /42menu.
        {
            llDialog(llGetOwner(), "What do you want to express?", MENU_UNHAPPY, CHANNEL);
            llDialog(llGetOwner(), "What do you want to express?", MENU_HAPPY, CHANNEL);
        }
    }
}

Hope you enjoy it.