In many Japanese cartoons, there is a way to draw lines on paper and then form many irregular grids. How are they grouped? High scores and charts

For example, if several people or groups participate in the lottery, just draw a few vertical lines, write the lottery results below the vertical lines, and then draw two horizontal lines randomly between the vertical lines, such as five people 10. Of course, there is no hard and fast rule that everyone can draw three lines.

After drawing, the lottery starts from the top of the vertical line. When the finger crosses the horizontal line, the horizontal line will reach another vertical line, and then the horizontal line will be drawn to another vertical line until it reaches the bottom.

I used to play in our university. I study in Japan.