Fit one pastry bag with medium-size round tip, and second pastry bag with a ridged basket-weave tip. Fill each bag with icing. Using bag fitted with round tip, pipe one vertical bar from bottom to top of cake. Using pastry bag fitted with basket-weave tip, and starting at bottom of cake, pipe horizontal band around side of cake, crossing the vertical bar. Moving up side of cake, leaving a decorator-tip width between bands, pipe another horizontal band. Using round tip, pipe another vertical bar up side of cake, 1 inch to right of first vertical bar. Repeat piping horizontal bars across second vertical bar, filling in blank decorating-tip width and creating a basket-weave effect. Repeat until there are vertical bars and horizontal bands all around the cake, resembling a basket. Remove the waxed paper strips from under the bottom of the cake.