When a user plow a plot, the number of spades decreases by 1. Error message appears when a user tries to plow with 0 spade. In the proposal, we had "determine if spade or bucket breaks." The implementation here is a little different to use the existing data structure of GameItemsEnum and UserItem. There is no spade breaking event here. Users can not plow when they have no spades instead of broken spades.