CMD:kill(playerid, params[])
{
    #pragma unused params
    //Since we don't need any parameters for kill command, we tag them as unused.

    SendClientMessage(playerid, 0xFF0000FF, "* You are attempting to suicide.");
    //Sending a message.

    ApplyAnimation(playerid, "CRACK", "crckdeth1", 4.1,1,1,1,1,1,1);
    //Apply animation instantly when the command is used.

    SetTimerEx("KillPlayer", 4000, false, "i", playerid);
    //Letting the timer call "KillPlayer" after 4 seconds.
    //And also passing "playerid" as an integer "i" for the KillPlayer callback.
    //Or else, the KillPlayer will target always target id 0.
}

forward KillPlayer(playerid);
public KillPlayer(playerid)
{
    return SetPlayerHealth(playerid, 0.0);
}