public UpdateSpeed()
{
    new Float:x,Float:y,Float:z;
    new Float:xx,Float:yy,Float:zz;
    new Float:distance,value,string[256];
    for(new i=0; i<MAX_PLAYERS; i++)
    {
        if((IsPlayerConnected(i))&&(IsPlayerInAnyVehicle(i)))
        {
            GetPlayerPos(i, x, y, z);
            GetPlayerPos(i, xx, yy, zz);
            distance=floatsqroot(floatpower(floatabs(floatsub(x,SavePlayerPos[i][LastX])),2)
            +floatpower(floatabs(floatsub(y,SavePlayerPos[i][LastY])),2)
            +floatpower(floatabs(floatsub(z,SavePlayerPos[i][LastZ])),2));
            value = floatround(distance * 3600);
            if(UpdateSeconds > 1)
            {
                value = floatround(value / UpdateSeconds);
            }
            if((SpeedMode[i]) == 1)
            {
                format(string,sizeof(string),"~n~~n~~n~~n~~n~~n~~n~~n~~w~SPEED: ~r~%d MP/H ~w~ALT: ~r~%d",floatround(value/1600),Float:zz);
                GameTextForPlayer(i, string, 1100, 5);
            }
            if((SpeedMode[i]) == 2)
            {
             	format(string,sizeof(string),"~n~~n~~n~~n~~n~~n~~n~~n~~w~SPEED: ~r~%d KM/H ~w~ALT: ~r~%d",floatround(value/1000),Float:zz);
             	GameTextForPlayer(i, string, 1100, 5);
            }
           	SavePlayerPos[i][LastX] = x;
           	SavePlayerPos[i][LastY] = y;
           	SavePlayerPos[i][LastZ] = z;
        }

    }
}