Control control;
void setup() {
  size(600, 600);
  Model model = new Model();
  View view = new View(model);
  view.drawPattern();
  control = new Control(model, view);
}

void draw() {}
void mousePressed() {
  control.press();
}

class Model {
  color[][] myData;
  color[][] myData2;
  boolean seq;
  color drawColor;

  Model() {
    myData = new color[5][5];
    myData2 = new color[5][5];
    seq = false;
    drawColor = color(0);
    for(int x = 0; x < 5; x++) {
      for(int y = 0; y < 5; y++) {
        myData[x][y] = color(255);
        myData2[x][y] = color(255);
      }
    }
  }
}

class View {
  Model model;
  View(Model model) {
     this.model = model;
  }

  void drawGrid(int offsetX, int offsetY) {
    for(int x = 0; x < 5; x++) {
      for(int y = 0; y < 5; y++) {
         fill(model.myData[x][y]);
         rect(offsetX + (x * 10), offsetY + (y * 10), 10, 10);
      }
    }
  }

  void drawGrid2(int offsetX, int offsetY) {
    for(int x = 0; x < 5; x++) {
      for(int y = 0; y < 5; y++) {
         fill(model.myData2[x][y]);
         rect(offsetX + (x * 10), offsetY + (y * 10), 10, 10);
      }
    }
  }

  void drawPattern() {
    fill(model.drawColor);
    rect(0, 100, 50, 50);

    drawGrid(0, 0);
    drawGrid2(0, 50);
    for(int x = 0; x < 11; x++) {
      for(int y = 0; y < 13; y++) {

        if(model.seq) {
          if(x % 2 == 0)
            drawGrid(x * 50 + 50, y * 50);
          else
            drawGrid2(x * 50 + 50, y * 50);
        }else {
          drawGrid(x * 50 + 50, y * 50);
        }
      }
    }
  }
}

class Control {
  Model model;
  View view;
  Control(Model model, View view) {
    this.model = model;
    this.view = view;
  }

  void press() {
    if(mouseButton == RIGHT) {
      model.seq = !model.seq;
      view.drawPattern();
      return;
    }

    int x = mouseX / 10;
    int y = mouseY / 10;
    if(x < 5 && y < 5) {
      model.myData[x][y] = model.drawColor;
      view.drawPattern();
    }else if(x < 5 && y < 10) {
      model.myData2[x][y - 5] = model.drawColor;
      view.drawPattern();
    }

    x = mouseX / 50;
    y = mouseY / 50;
    if(x == 0 & y == 2) {
      model.drawColor = color(random(255), random(255), random(255));
      view.drawPattern();
    }
  }
}