Precedurale version of Conway's Game of Life

GameOFLife3.pde

//Settings
int size = 400;
float startCellsPercentage = 20;
int framrate = 60;

//Rules for living cells from 0 to 8 neighbours, true = lives on, false = dies
boolean[] aliveCellRules = {
  false, false, true, true, false, false, false, false
};

//Rules for dead cells from 0 to 8 neighbours, true = rebirth, false = still dead
boolean[] deadCellRules = {
  false, false, false, true, false, false, false, false
};

//Game-Canvas
boolean[][] canvas = new boolean[size][size];

void setup() {
  size(size, size);
  frameRate(framrate);
  noLoop();

  //Initialize the canvas with randomly living and dead cells
  for (int i = 0; i < width; i = i + 1) {
    for (int j = 0; j < height; j = j + 1) {
      float rnd = random(0, 99);
      if (rnd < startCellsPercentage) {
        //Alive
        canvas[i][j] = true;
      }
      else {
        //Dead
        canvas[i][j] = false;
      }
    }
  }
}



void draw() {
  //Background
  rect(0, 0, width, height);

  //Dead or alive?
  for (int i = 1; i < width-1; i = i + 1) {
    for (int j = 1; j < height-1; j = j + 1) {

      //Cell is alive
      if (canvas[i][j] == true) {
        int aliveCounter = 0;

        //Surrounding cells are checked (including itself)
        for (int k = -1; k <= 1; k++) {
          for (int l = -1; l <= 1; l++) {
            if (canvas[i+k][j+l] == true) {
              aliveCounter++;
            }
          }
        }

        //minus itself
        aliveCounter--;

        //Applying rules
        for (int p = 0; p <= 8; p++) {
          if (aliveCounter == p) {
            canvas[i][j] = aliveCellRules[p];
          }
        }
      }

      //Cell is dead
      else {
        int aliveCounter = 0;

        //Surrounding cells are checked
        for (int k = -1; k < 2; k++) {
          for (int l = -1; l < 2; l++) {
            if (canvas[i+k][j+l] == true) {
              aliveCounter++;
            }
          }
        }

        //Applying rules
        for (int p = 0; p <= 8; p++) {
          if (aliveCounter == p) {
            canvas[i][j] = deadCellRules[p];
          }
        }
      }
    }
  }

  //Painting the canvas
  for (int i = 0; i < width; i = i + 1) {
    for (int j = 0; j < height; j = j + 1) {
      if (canvas[i][j] == true) {
        point(i, j);
      }
    }
  }
}

void mousePressed(){
  redraw();
}