Notice Error In Footer Section

Hello,

I am new in the opencart and i am using the obtronics theme. All working properly in this cart regarding one problem which is appearedin footer section. And the error is following:-
Notice: Undefined variable: footer_top in C:\xampp\htdocs\kiranastore\catalog\view\theme\bt_optronics\template\common\footer.tpl on line 7

Notice: Undefined variable: footer_bottom in C:\xampp\htdocs\kiranastore\catalog\view\theme\bt_optronics\template\common\footer.tpl on line 33

Please help us to resolve this problem as soon as possible

You will need to contact the theme developer, as footer_top and footer_bottom are not part of the default OC install.

The theme is looking for information from the controller that either hasn't been installed or isn't there.

First check to make sure you have followed the install instructions for that particular theme correctly.