Ищу схемку...
http://images.google.ru/imglanding?imgurl=http://content.foto.mail.ru/mail/raduga.54/1836/i-2072.jpg&imgrefurl=http://marisha54.livejournal.com/tag/%25D0%25B2%25D1%258F%25D0%25B7%25D0%25B0%25D0%25BD%25D0%25B8%25D0%25B5%2B%25D0%25B4%25D0%25B5%25D1%2582%25D1%258F%25D0%25BC&usg=__yzziNxY_e3lvsj5EMyygXcbG4OQ%3D&h=450&w=600&sz=149&hl=ru&sig2=6Oe7WNZAm7xVVdTXES_qNg&um=1&tbnid=V5nWfbKKohOQfM:&tbnh=101&tbnw=135&prev=/images%3Fq%3D%25D0%25BF%25D0%25BB%25D0%25B5%25D0%25B4%2B%25D0%25BA%25D1%2580%25D1%258E%25D1%2587%25D0%25BA%25D0%25BE%25D0%25BC%26ndsp%3D18%26hl%3Dru%26lr%3D%26safe%3Dactive%26rlz%3D1G1GGLQ_RURU312%26sa%3DN%26start%3D36%26um%3D1&ei=Nr4SS8ioFsqF-QaS0dCbDg&q=%D0%BF%D0%BB%D0%B5%D0%B4+%D0%BA%D1%80%D1%8E%D1%87%D0%BA%D0%BE%D0%BC&ndsp=18&lr=&safe=active&rlz=1G1GGLQ_RURU312&sa=N&start=45&um=1
заранее спасибо)