def line(x, y, width=0.1):
    """Draw a line"""
    ctx = _state["ctx"]
    ctx.move_to(0, 0)
    ctx.line_to(x, y)
    ctx.close_path()
    # _ctx.set_source_rgb (0.3, 0.2, 0.5)
    ctx.set_line_width(width)
    ctx.stroke()