I have seen on server how dude used command and he sat. How to script it in pawn? Or, how to create your own includes?

It was nothing to do
I get an idea and I've created napalm making system using 3 items
It's my first thing i made in PAWNO, i made it though scores adding. Comments pls.
So:
put in public OnGameModeInit()
[pawn]   
    AddStaticPickup(1, 578, 37.50, -1056.25, 10.25);
    AddStaticPickup(2, 597, 191.25, -1013.75, 11.375);
    AddStaticPickup(3, 409, 11.25, -950, 10);[/pawn]
put in public OnPlayerCommandText(playerid, cmdtext[])
[pawn]
{
    if (strcmp(cmdtext, "makenapalm", true)==0 && GetPlayerScore(playerid)==3)
    {
        SendClientMessage(playerid, 0xFF0000AA, "You made napalm from materials you got");
        SetPlayerWeapon(playerid, 15, 1);
        SetPlayerScore(playerid, -3);
        return 1;
    }
    else if (strcmp(cmdtext, "makenapalm", true)==0 && GetPlayerScore(playerid)<=3)
    {
        SendClientMessage(playerid, 0xFF0000AA, "You do not have one more materials");
        return 1;
    }
return 0;
}[/pawn]

and in public OnPickedUp(pickupid, playerid)
[pawn]
{
    if(pickupid==1)
    {
        GameTextForPlayer(playerid, "~w~You got a can of gas");
        SetPlayerScore(playerid, GetPlayerScore(playerid) + 1);
    }
    if(pickupid==2)
    {
        GameTextForPlayer(playerid, "~w~You got a wine bottle");
        SetPlayerScore(playerid, GetPlayerScore(playerid) + 1);
    }
    if(pickupid==3)
    {
        GameTextForPlayer(playerid, "~w~You got a fuse");
        SetPlayerScore(playerid, GetPlayerScore(playerid) + 1);
    }
    return 1;
}
[/pawn]