marine_line.rs

fn marine_line() -> String {
    use rand::{seq::SliceRandom, Rng};

    let marine_life = ["🐳", "🐠", "🦈", "🐙", "🐡", "🐬", "🐟", "🦀", "🐋"];
    let water = [
        "\x1B[38;2;0;100;200m≈\x1B[0m",
        "\x1B[38;2;10;110;210m≈\x1B[0m",
        "\x1B[38;2;20;120;220m≈\x1B[0m",
        "\x1B[38;2;30;130;230m≈\x1B[0m",
        "\x1B[38;2;40;140;240m≈\x1B[0m",
        "\x1B[38;2;50;150;250m≈\x1B[0m",
        "\x1B[38;2;60;160;255m≈\x1B[0m",
        "\x1B[38;2;70;170;255m≈\x1B[0m",
        "\x1B[38;2;80;180;255m≈\x1B[0m",
        "\x1B[38;2;90;190;255m≈\x1B[0m",
        "\x1B[38;2;100;200;255m≈\x1B[0m",
        "\x1B[38;2;110;210;255m≈\x1B[0m",
        "\x1B[38;2;120;220;255m≈\x1B[0m",
        "\x1B[38;2;130;230;255m≈\x1B[0m",
        "\x1B[38;2;140;240;255m≈\x1B[0m",
    ];

    let mut buffer = String::new();
    let mut last_generated = "";
    for i in 0..80 {
        let position = i as f32 / 80.0;
        let middle_weight = 1.0 - (position - 0.5).abs() * 2.0;
        let chance = 0.125 + middle_weight * 0.125; // Ranges from 0.125 to 0.25

        let set = if rand::thread_rng().gen::<f32>() < (chance * 0.5) {
            &marine_life[..]
        } else {
            &water[..]
        };
        let generated = *set.choose(&mut rand::thread_rng()).unwrap();

        if generated == last_generated {
            buffer.push_str(water.choose(&mut rand::thread_rng()).unwrap());
        } else {
            buffer.push_str(generated);
            last_generated = generated;
        }
    }
    buffer
}