Cell[][] _cellArray;
int _cellSize = 10;
int _numX, _numY;
float state;
void setup() {
  size(500, 300);
  _numX = floor(width/_cellSize);
  _numY = floor(height/_cellSize);
  restart();
}
void restart() {


}
void draw() {

  background(200);

  state=random(2);
  _cellArray = new Cell[_numX][_numY];
  for (int x=0; x<_numX;x++){
    for(int y=0; y<_numY;y++){
      Cell newCell = new Cell(x,y,state);
      _cellArray[x][y]=newCell;
    }
  }
  translate(_cellSize/2, _cellSize/2);
  for (int x=0; x<_numX;x++){
    for (int y=0; y<_numY; y++){
      _cellArray[x][y].drawMe();
    }
  }
}
void mousePressed(){
  restart();
}
class Cell{
  float x, y;
  boolean state;
  boolean nextState;
  Cell(float ex, float why, float s) {
    x = ex * _cellSize;
    y = why * _cellSize;
    if(s>1){
      nextState = true;

    } else {
      nextState = false;
    }
    state = nextState;
  }

  void drawMe() {
    state = nextState;
    stroke(0);
    if (state == true) {
      fill(0);
    } else {
      fill(255);
    }
    ellipse(x, y, _cellSize, _cellSize);
   }
}