In this website there will be products to be sold by auction where every click of the user increases the price by 1 Kr. If there is no increase in 2 minutes, the last clicker buys the product with the last price. Here, no product will be sold more than its half price. If one person spends too much money for a product or if the product value on the screen also gets too close to its real value, the product will be given as a promotion without paying the written value of the auction. This promotion value of the product will be calculated through a function of 2 variables, where one of it is the demand and the other is a randomly chosen variable from a category that we do not tell you in order to prevent guesses for promotion values.