这是一篇测试代码块高亮的测试！

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pub struct ChartParser;

impl ChartParser {
    pub fn parse_chart(pairs: Pairs<Rule>) -> Chart {
        let root_pair = pairs
            .into_iter()
            .next()
            .expect("parser: expect chart, found nothing");
        if root_pair.as_rule() != Rule::chart {
            panic!("parser: expect chart, found {:?}", root_pair);
        }
        let mut note_collections = Vec::<NoteCollection>::new();
        let mut timings = Vec::<Timing>::new();
        let mut time = 0.0;
        timings.push(Timing::default());
        for it in root_pair.into_inner() {
            let rule = it.as_rule();
            match rule {
                Rule::tempo_change => time_parser::parse_tempo_change(it, &mut timings, time),
                Rule::subdivision_change => {
                    time_parser::parse_subdivision_change(it, &mut timings, time)
                }
                Rule::note_collection => {
                    note_collections.push(note_parser::parse_note_collection(it, &timings, time))
                }
                Rule::time_step => time += time_parser::parse_time_step(&timings),
                Rule::COMMENT | Rule::WHITESPACE | Rule::eof | Rule::eoi => {}
                _ => {
                    panic!("parser: unexpected rule {:?}", rule)
                }
            };
        }
        Chart {
            note_collections,
            timings,
        }
    }
}
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public class LoadScreen implements Screen {
    Texture loadTexture;
    Texture loadTextTexture;
    SpriteBatch spriteBatch;
    int initSpeed=250;
    Vector2 speed=new Vector2(0,0);
    Vector2 aSpeed=new Vector2(0,-1000f);
    Color color = Color.valueOf("#52B4FFFF");
    float y;

    public LoadScreen(){
        loadTexture=new Texture("game/loading/Loading.png");
        loadTextTexture=new Texture("game/loading/LoadingText.png");
        spriteBatch=new SpriteBatch();
    }

    // Add more logic here...
}