Player P1;
Enemy E1;
float turn = 0;
float px = 170;
float py = 350;
float ex = 330;
float ey = 350;

void setup() {
  size(800, 800);
  P1 = new Player();
  E1 = new Enemy();
}

void draw() {
  turn = 0;
  background(150);
  fill(200);
  rect(160,380,40,40);
  rect(160,340,40,40);
  rect(200,380,40,40);
  rect(200,340,40,40);
  rect(240,380,40,40);
  rect(240,340,40,40);
  rect(280,380,40,40);
  rect(280,340,40,40);
  rect(320,380,40,40);
  rect(320,340,40,40);
  rect(360,380,40,40);
  rect(360,340,40,40);
  rect(400,380,40,40);
  rect(400,340,40,40);
  rect(440,380,40,40);
  rect(440,340,40,40);
  P1.Collision();
  P1.Movement();
  P1.Display();
  E1.ECollision();
  E1.EMovement();
  E1.EDisplay();
}

class Enemy {
  Enemy() {
  }
  void ECollision() {
  }
  void EMovement() {
    if (turn == 1) {
      if (ex > px) {
        ex = ex - 20;
        turn = 0;
      }
    }
  }
void EDisplay() {
  rect(ex, ey, 20, 20);
}

class Player {
  Player() {
  }
  void Collision() {
  }
  void Movement() {
    if (key == 'd') {
      px = px + 20;
      turn = 1;
      key = 'e';
    }
    if (key == 'a') {
      px = px - 20;
      key = 'e';
    }
    if (key == 's') {
      py = py + 20;
      key = 'e';
    }
    if (key == 'w') {
      py = py - 20;
      key = 'e';
    }
  }
  void Display() {
    fill(90);
    rect(px, py, 20, 20);
  }
}

class Enemy {
  Enemy() {
  }
  void ECollision() {
  }
  void EMovement() {
    if (turn == 1) {
      if (ex > px) {
        ex = ex - 20;
        turn = 0;
      }
    }
  }
  void EDisplay() {
    rect(ex, ey, 20, 20);
  }
}

class Player {
  Player() {
  }
  void Collision() {
  }
  void Movement() {
    if (key == 'd') {
      px = px + 20;
      turn = 1;
      key = 'e';
    }
    if (key == 'a') {
      px = px - 20;
      key = 'e';
    }
    if (key == 's') {
      py = py + 20;
      key = 'e';
    }
    if (key == 'w') {
      py = py - 20;
      key = 'e';
    }
  }
  void Display() {
    fill(90);
    rect(px, py, 20, 20);
  }
}