use svg::node::element::{Group, Polygon};

fn main() {
    let mut doc = svg::Document::new().set("stroke", "white");
    let mut base: Vec<[(f64, f64); 2]> = vec![[(-200.0, 0.0), (200.0, 0.0)]];
    for lvl in 0..12u8 {
        let rg = |step| lvl.wrapping_mul(step).wrapping_add(80 - step * 2);
        let mut group = Group::new().set("fill", format!("#{:02X}{:02X}18", rg(20), rg(30)));