ArrayList< int[] > cirPos = new ArrayList<int[]>();

void setup()
{

  background(255);
  size(600,600);
  fill(245, 239, 66);
  try{
    readfile();
    refresh();
  }
  catch(Exception e)
  {}


}

void draw()
{

}


void mousePressed()
{

  if (mouseButton == LEFT)
  {
     circle(mouseX , mouseY , 50);

     int[] thisPos = {mouseX , mouseY , 50};    // (x,y,size)
     cirPos.add(thisPos);
     thread("writefile");
  }

  else if (mouseButton == RIGHT)
  {
    double L = 0;

    int[] mousePos = {mouseX,mouseY};
    for (int i = cirPos.size()-1;i>=0;i--)
    {
      L = sqrt(pow(cirPos.get(i)[0] - mousePos[0] , 2)   +  pow(cirPos.get(i)[1] - mousePos[1] , 2) );
      if (L <= cirPos.get(i)[2])
      {
        cirPos.remove(i);
        thread("writefile");
        refresh();
      }
    }

  }


}

void refresh()
{
  background(255);
  for (int[] n : cirPos)
  {
      circle(n[0] , n[1] , n[2]);
  }
}


void writefile()
{
  JSONArray values = new JSONArray();

  for (int i = 0; i < cirPos.size(); i++) {

    JSONObject eachCir = new JSONObject();

    eachCir.setInt("x", cirPos.get(i)[0]);
    eachCir.setInt("y", cirPos.get(i)[1]);
    eachCir.setInt("size", cirPos.get(i)[2]);

    values.setJSONObject(i, eachCir);
  }

  saveJSONArray(values, "cirPos.json");

}

void readfile()
{

  JSONArray values = loadJSONArray("cirPos.json");

  for (int i = 0; i < values.size(); i++)
  {

    JSONObject eachPos = values.getJSONObject(i);

    int x = eachPos.getInt("x");
    int y = eachPos.getInt("y");
    int size = eachPos.getInt("size");

    int[] oPos = {x , y , size};
    cirPos.add(oPos);

  }


}