What is climbing a ladder?

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.