Velocity, Health filterscript

#include <a_samp>
new PlayerText:Velocity[MAX_PLAYERS];

forward VehicleUpdate(); // forwarding VehicleUpdate();



public OnFilterScriptInit()
{
    printf("lcp9's velocity and health filterscript");
    SetTimer("VehicleUpdate",1*750,1);
    return 1;
}

public OnPlayerConnect(playerid)
{
    Velocity[playerid] = CreatePlayerTextDraw(playerid,520,320,"_~N~Velocity: 0~N~Health: 0~N~_");
    PlayerTextDrawTextSize(playerid,Velocity[playerid],630,0);
    PlayerTextDrawUseBox(playerid,Velocity[playerid],1);
    PlayerTextDrawBoxColor(playerid,Velocity[playerid],0x00000066);
    PlayerTextDrawHide(playerid,Velocity[playerid]);
    return 1;
}
stock GetKph(vehicleid)
{
    new Float:x,Float:y,Float:z; // Creating Float variables
    GetVehicleVelocity(vehicleid,x,y,z); // Writing in the x,y,z coordinates the speed values.
    return floatround(floatsqroot((x*x)+(y*y)+(z*z))*156.666667); // It returns the kph of the vehicle
}
public VehicleUpdate()
{
    for(new i = 0;i < MAX_PLAYERS; i++) // i is the playerid
    {
        if(IsPlayerConnected(i)) // the same as if(IsPlayerConnected(i) == 1)
        {
            if(IsPlayerInAnyVehicle(i) == 1) // You could also write if(IsPlayerInAnyVehicle(i))
            {
                new vehicleid = GetPlayerVehicleID(i); // Getting the vehicleid, and write it into the vehicleid variable
                new kph = GetKph(vehicleid); // Using our function to get the kph velocity of our vehicle
                new Float:health;
                GetVehicleHealth(vehicleid,health); //writing in health the health of the vehicle
                new string[256];
                format(string,sizeof(string),"_~N~Velocity: %i~N~Health: %i%%~N~_",kph,floatround(health / 10)); // %i if you want to write an integer variable into the string, %% if you want to write a %, we want to show health with per cents so we have to to 'health / 10'
                PlayerTextDrawSetString(i,Velocity[i],string); // setting the PlayerTextDraw string
                PlayerTextDrawShow(i,Velocity[i]); // Showing the TextDraw to the player i
            }
            else if(!IsPlayerInAnyVehicle(i)) // You could also write else if(IsPlayerInAnyVehicle(i) == 0))
            {
                PlayerTextDrawHide(i,Velocity[i]); // The TextDraw has to be hidden
            }
        }
        else if(!IsPlayerConnected(i)) //same as if(IsPlayerConnected(i) == 0)
        {
            PlayerTextDrawHide(i,Velocity[i]); // The TextDraw has to be hidden
        }
    }
    return 1;
}