use tui;
use tui::canvas;
let line = `Line({color: `Red, x1: 0.0, y1: 0.0, x2: 10.0, y2: 5.0});
let circle = `Circle({color: `Blue, x: 5.0, y: 5.0, radius: 2.0});
canvas(
#x_bounds: &{min: 0.0, max: 10.0},
#y_bounds: &{min: 0.0, max: 10.0},
&[&line, &circle]
)