load(draw);
draw2d(
    terminal        = svg,
    dimensions      = [600,600],
    file_name        = "butterfly_trans01",
    proportional_axes = xy,
    nticks          = 1000,
    grid            = true,
    xaxis           = true,
    xtics           = {0,1,2,3,4,5},
    xtics_axis      = true,
    yaxis           = true,
    ytics           = false,
    axis_top        = false,
    axis_bottom     = false,
    axis_left       = false,
    axis_right      = false,
    xrange          = [-5,5],
    yrange          = [-5,5],
    user_preamble   = "set grid polar",
    color           = red,
    polar(exp(sin(t))-2*cos(4*t)+sin((2*t-%pi)/24)^5, t, -8*%pi,8*%pi)
);