hide & unhide columns on different sheet based on criteria

Hi all,

I need a Macro that I can call with a keystroke to toggle between hiding and unhiding columns on a different sheet.

My "view" sheet has all relevant attribute columns from the "Buy" sheet and clients can click the 'tick box' to keep columns visible or hide them. The Macro should NOT run every time they select or unselect a column, but rather whenever they are on the "Buy" sheet and use the keystroke e.g. "CTRL + SHIFT + 1", which then unhides and hides the columns just as specified on the "view" sheet.

I have attached a sample workbook to make things more clear...