You’re in a building. Big one, lots of floors. You’re on the ground floor, and you have to get to the top. There are stairs, but you’re lazy and you don’t want to take them. Luckily, there are two elevators: One that goes up, and the other that comes down. Press the button for the […]
You’re in a building. Big one, lots of floors. You’re on the ground floor, and you have to get to the top. There are stairs, but you’re lazy and you don’t want to take them. Luckily, there are two elevators: One that goes up, and the other that comes down. Press the button for the […]