plugin 'captcha' => {
    session_name => 'session_string',

    out => { force => 'jpeg' },
    particle => [ 0, 0 ],
  create   => [qw/ttf box #80C0F0 #0F644B/],  
    new      => {
        rnd_data => [ '0' .. '9', 'A' .. 'H', 'a'.. 'h' ],
        width    => 120,
        height   => 60,
        lines    => 1,
        angle    => 0,
        font => 'arial.ttf',
       ptsize => 24,

    }
};