And maybe do other spreadsheets where you experiment with it. So this spreadsheet, what we do is we're doing a game where let's say I'm sitting, I'm on a street, and I flip a coin. I flip a completely fair coin. If I get heads, let's say this is heads, I take a step backwards, or let's say a step to the left. And if I get a tails, I take a step to the right. So in general, I always have a 50, this is a completely fair coin. I have a 50% chance of taking a step to the left.