It starts by making a $30 bet on the Don't Pass line; if the shooter throws a 7 or 11 on the comeout roll, you lose. If s/he throws a 2 or 3, you win and if a 12 is thrown, no money changes hands. If a point number is thrown (4,5,6,8,9,10), make a Place bet of $30 on that number. If the shooter makes the points, you'll loose $30 on Don't Pass, but win on the Place bet as follows:
At that point, remove the original Place bet and begin again with a $30 Don't Pass bet.