Macro to unhide a column, and then unhide a second column

Hello, am working with the attached file where if particular text ("Other" or "Summer") is input in either column B or D, the column to the right ("C" or "E") are unhidden. One more step is needed where if additional text is input into column "C" or "E", that column needs to remain unhidden. It currently hides after typing new text.

Any suggestions?

Thanks so much.
Sheryl