def create_ui():
    screen.fill(BLACK)
    clear_button.draw(screen)
    create_button.draw(screen)
    dfs_button.draw(screen)
    bfs_button.draw(screen)
    quit_button.draw(screen)
    draw_grid()
def create_ui():
    screen.fill(BLACK)
    clear_button.draw(screen)
    create_button.draw(screen)
    dfs_button.draw(screen)
    bfs_button.draw(screen)
    quit_button.draw(screen)
    draw_grid()