I'm tryna make a toggle menu but when I press G it doesn't open the menu

when green flag clicked
hide
set (shop) to [0]
forever
if <key [g v] pressed?> then
wait until <not <key [g v] pressed?>>
if <not <(shop) = [1]>> then
set [shop v] to [1]
show
end
if <(shop) = [1]> then
set [shop v] to [0]
hide
end
end
end

whats the issue