[Sojo12]

I want to add blow bank system, when you be at the right coordinates or near them, you explode but i dont know how, what function should I use or could you post me a fixed code.
Here is my function:

Код:

public ExplodeC4(playerid)
{
  new Float:x, Float:y, Float:z;
  GetObjectPos(C4T, x, y, z);
  DestroyObject(C4T);
  CreateExplosion(x, y, z, 7, 10.0);
  C4T= 0;
  return 1;
}

Thanks in advance.