Hello,both sidebars(left & right)are in right of main content position but i want make them like demo (right sidebar in the right of main content and left sidebar in the left of main content)what should i do???

Dear zoorikh!
Could you please send us your live URl and if possible, the screenshots so that we could have closer look on the issue.

please see this screenshot

thank you i found it but i dont know how i can change size of them(with)

Dear zoorikh!
Please go to the file: YOUR_TEMPLATE /layouts/main-left-right.xml(or curent layout) to customize.

To show the beauty is: width of the left position + pright position = width of the right group(Administrator/Template Manager/sj-news/tab:MainBody Column Settings/Right width)