To clarify: put sand in the bottom first.
Then put an inch of sand around the border next, then an inch of sugar mixture in the center.
Then another inch of sand around the border, then another inch of sugar mixture in the center.
etc, etc.
Then put an inch of sand around the border next, then an inch of sugar mixture in the center.
Then another inch of sand around the border, then another inch of sugar mixture in the center.
etc, etc.