So, for example, it would look like this. We are starting at time t equals zero. Our position, this is our vertical axis, our y-axis, but we're just saying y is going to be equal to our position along the x-axis. So that's a little bit counterintuitive, because we're talking about our position in the left-right dimension, and here you're seeing it start off in the vertical dimension. But you see the same thing. At time t equals one, our position has gone down to three, then it goes down further. At time equals two, our position is down to one.