int columns = 25; // 縦方向 - y
int rows = 25;    // 横方向 - x
 
int[][] current = new int[columns][rows];
int[][] next = new int[columns][rows];
 
void keyPressed()
{
  for (int y = 0; y < columns; y++) {
    for (int x = 0; x < rows; x++) {
      // Initialize each cell with a 0 or 1.
      current[y][x] = int(random(2));
    }
  }
}
void setup() {
  size(500, 500);
  frameRate(5);
  for (int y = 0; y < columns; y++) {
    for (int x = 0; x < rows; x++) {
      // Initialize each cell with a 0 or 1.
      current[y][x] = int(random(2));
    }
  }
}
void draw()
{
  background(0);
  println(frameRate);
  int x, y;
  for ( y = 1; y < columns-1; y++ ) {
    for ( x = 1; x < rows-1; x++ ) {
      int neighbors = 0;
      for (int i = -1; i <= 1; i++) {
        for (int j = -1; j <= 1; j++) {
          neighbors += current[y+i][x+j];
        }
      }
      neighbors -= current[y][x];
      if ( (current[y][x] == 1) && (neighbors < 2 )) {
        next[y][x] = 0;
      } else if ( (current[y][x] == 1)&&(neighbors > 3 )) {
        next[y][x] = 0;
      } else if ( (current[y][x] ==0 )&& (neighbors == 3 )) {
        next[y][x] = 1;
      } else {
        next[y][x] = current[y][x];
      }
    }
  }
  current = next;
 
 
 float width_cell = width/rows;
 float height_cell = height/columns; 
 noStroke();
  for ( y = 0; y < columns; y+=1 ) {
    for ( x = 0; x < rows; x+=1 ) {
      fill(255*current[y][x]);      
      rect(x*width_cell,y*height_cell,width_cell,height_cell);
    }
  }
}