[Konstantinos]

Before:

pawn Код:

GetPlayerPos(playerid, x, y, z);

Add:

pawn Код:

new Float: x, Float: y, Float: z;
// we now declared the variables x, y, z so we can use them later.
GetPlayerPos(playerid, x, y, z); // then this line..

About the COLOR_GREEN, you need to define it.

Go at the top, under includes, defines etc..
and add:

pawn Код:

#include <a_samp>
// some other includes and defines

#define COLOR_GREEN 0x00FF00FF

// callbacks here: public blabla..