All the way through

As a child I was brought up in Blackpool
Living so close to the beach and
Licking my stick of rock with gusto
The family would stroll on the sand

How wonderful were all the flavours
Every one tasted the best until
Weighed against the newest and brightest
And added to my sugar, sticky vest

Yellow pineapple, pink berries,
Thick purple currents, green mint
How many candy-sweet varieties
Reduced from a stick to flint?

Orange ones were made to be favourites
United in colour and taste, but I still
Got confused by the words 'Blackpool Rock';
How did they get them all the way through?