maze

int maze(unsigned char labyrinth[100][100], uint8_t size_x, uint8_t size_y, uint8_t start_x, uint8_t start_y) {
    // for moving up in the maze
    if (start_x > 0) {
        if (labyrinth[start_x - 1][start_y] == MAZE_FINISH) {
            return 0;
        } else {
            if (labyrinth[start_x - 1][start_y] == MAZE_WALKWAY) {
                labyrinth[start_x - 1][start_y] = MAZE_STEP;
                if (maze(labyrinth, size_x, size_y, start_x - 1, start_y) == 0) {
                    return 0;
                } else {
                    labyrinth[start_x - 1][start_y] = MAZE_WRONG;
                }
            }
        }
    }
    // for moving down in the maze
    if (start_x < size_x) {
        if (labyrinth[start_x + 1][start_y] == MAZE_FINISH) {
            return 0;
        } else {
            if (labyrinth[start_x + 1][start_y] == MAZE_WALKWAY) {
                labyrinth[start_x + 1][start_y] = MAZE_STEP;
                if (maze(labyrinth, size_x, size_y, start_x + 1, start_y) == 0) {
                    return 0;
                } else {
                    labyrinth[start_x + 1][start_y] = MAZE_WRONG;
                }
            }
        }
    }
    // for moving left in the maze
    if (start_y > 0) {
        if (labyrinth[start_x][start_y - 1] == MAZE_FINISH) {
            return 0;
        } else {
            if (labyrinth[start_x][start_y - 1] == MAZE_WALKWAY) {
                labyrinth[start_x][start_y + 1] = MAZE_STEP;
                if (maze(labyrinth, size_x, size_y, start_x, start_y - 1) == 0) {
                    return 0;
                } else {
                    labyrinth[start_x][start_y - 1] = MAZE_WRONG;
                }
            }
        }
    }
    // for moving right in the maze
    if (start_y < size_y) {
        if (labyrinth[start_x][start_y + 1] == MAZE_FINISH) {
            return 0;
        } else {
            if (labyrinth[start_x][start_y + 1] == MAZE_WALKWAY) {
                labyrinth[start_x][start_y + 1] = MAZE_STEP;
                if (maze(labyrinth, size_x, size_y, start_x, start_y + 1) == 0) {
                    return 0;
                } else {
                    labyrinth[start_x][start_y + 1] = MAZE_WRONG;
                }
            }
        }
    }
    return 1;
}