public int gameWidth = 9;
public int gameHeight = 9;

public int[][][] gameGrid = new int[gameWidth][gameHeight][4];

public void generateMap() {
for (int j = 0; j < gameWidth; j++) {
  for (int i = 0; i < gameHeight; i++) {

    int n = 0;

    int left = 0;
    int up = 0;
    int right = 0;
    int down = 0;

    try {
      if (gameGrid[i-1][j][2] == 2 || gameGrid[i-1][j][2] == 1 || gameGrid[i-1][j][2] == 0) {
        left = gameGrid[i-1][j][2];
        n++;
      }
    }
    catch (ArrayIndexOutOfBoundsException e) {
      left = 0;
    }

    try {
      if (gameGrid[i][j-1][3] == 2 || gameGrid[i][j-1][3] == 1 || gameGrid[i][j-1][3] == 0) {
        up = gameGrid[i][j-1][3];
        n++;
      }
    }
    catch (ArrayIndexOutOfBoundsException e) {
      up = 0;
    }

    try {
      if (gameGrid[i+1][j][0] == 2 || gameGrid[i+1][j][0] == 1 || gameGrid[i+1][j][0] == 0) {
        right = 2;
        n++;
      }
    }
    catch (ArrayIndexOutOfBoundsException e) {
      right = 0;
    }

    try {
      if (gameGrid[i][j+1][1] == 2 || gameGrid[i][j+1][1] == 1 || gameGrid[i][j+1][1] == 0) {
        down = 2;
        n++;
      }
    }
    catch (ArrayIndexOutOfBoundsException e) {
      down = 0;
    }

    gameGrid[i][j][0] = left;
    gameGrid[i][j][1] = up;
    gameGrid[i][j][2] = right;
    gameGrid[i][j][3] = down;

    if (left == 0 && up == 0) {
      int r = int(random(0, 2));
      if (r == 0) {
        if (gameGrid[i][j][2] == 2) {
          gameGrid[i][j][2] = int(random(0, 2));
          if (gameGrid[i][j][2] == 0) {
            if (gameGrid[i][j][3] == 2) {
              gameGrid[i][j][3] = 1;
            }
          } else if (gameGrid[i][j][2] == 1) {
            if (gameGrid[i][j][3] == 2) {
              gameGrid[i][j][3] = int(random(0, 2));
            }
          }
        }
      } else if (r == 1) {
        if (gameGrid[i][j][3] == 2) {
          gameGrid[i][j][3] = int(random(0, 2));
          if (gameGrid[i][j][3] == 0) {
            if (gameGrid[i][j][2] == 2) {
              gameGrid[i][j][2] = 1;
            }
          } else if (gameGrid[i][j][3] == 1) {
            if (gameGrid[i][j][2] == 2) {
              gameGrid[i][j][2] = int(random(0, 2));
            }
          }
        }
      }
    } else if (left == 1 && up == 1) {
      if (gameGrid[i][j][2] == 2) {
        gameGrid[i][j][2] = int(random(0, 2));
        if (gameGrid[i][j][2] == 0) {
          if (gameGrid[i][j][3] == 2) {
            gameGrid[i][j][3] = 1;
          }
        } else if (gameGrid[i][j][2] == 1) {
          if (gameGrid[i][j][3] == 2) {
            gameGrid[i][j][3] = int(random(0, 2));
          }
        }
      } else if (gameGrid[i][j][3] == 2) {
        if (gameGrid[i][j][3] == 2) {
          gameGrid[i][j][3] = int(random(0, 2));
        }
      }
    } else if (((left == 1 && up == 0) || (left == 0 && up == 1)) && n != 2) {
      int r = int(random(0, 2));
      if (r == 0) {
        if (gameGrid[i][j][2] == 2) {
          gameGrid[i][j][2] = int(random(0, 2));
          if (gameGrid[i][j][2] == 0) {
            if (gameGrid[i][j][3] == 2) {
              gameGrid[i][j][3] = 1;
            }
          } else if (gameGrid[i][j][2] == 1) {
            if (gameGrid[i][j][3] == 2) {
              gameGrid[i][j][3] = int(random(0, 2));
            }
          }
        } else if (gameGrid[i][j][2] == 0) {
          if(gameGrid[i][j][3] == 2) {
            gameGrid[i][j][3] = 1;
          }
        }
      } else if (r == 1) {
        if (gameGrid[i][j][3] == 2) {
          gameGrid[i][j][3] = int(random(0, 2));
          if (gameGrid[i][j][3] == 0) {
            if (gameGrid[i][j][2] == 2) {
              gameGrid[i][j][2] = 1;
            }
          } else if (gameGrid[i][j][3] == 1) {
            if (gameGrid[i][j][2] == 2) {
              gameGrid[i][j][2] = int(random(0, 2));
            }
          }
        } else if (gameGrid[i][j][3] == 0) {
          if(gameGrid[i][j][2] == 2) {
            gameGrid[i][j][2] = 1;
          }
        }
      }
    } else if (n == 2) {
      if(i == gameWidth-1 && j == 0) {
        gameGrid[i][j][3] = 1;
      } else if(i == 0 && j == gameHeight-1) {
        gameGrid[i][j][2] = 1;
      }
    }
  }
}