It was really hard to understand the basics behind it at first. For example when the box moved to the right, both vanishing points would move slowly to the left. And as it moved to the right, one side of it appeared more instead of the other. When drawing the 4 boxes with 3 vanishing points, I had to imagine a lot more. After a while, I became too tired and just connected wrong lines.

But overall I was really proud of myself for watching the video, reading the instructions and finishing the exercise all in 1 day!