How to fold darts with paper?

Next, we divide this paper into two halves vertically, and then we take any piece of paper and fold it vertically.

2. After folding, we will use the side without opening to fold 90 degrees down from the edge. At this time, we will fold it down and make a 90-degree angle with the side. Don't open it again. Pay attention to leave a small seam when folding, and use it when we fold the ninja darts in the last step.

3. After folding, we can see that it is folded into an isosceles triangle, and then we have to turn this paper upside down or fold it at a 90-degree angle with the side without opening, leaving a seam at this angle.

Turn the paper over again at this time. This time, we use the open side and fold it at a 90-degree angle. We cut off the excess paper. At this time, we will see two isosceles triangles from bottom to top. Now we are going to use the paper that has just been split in two, and use this paper to fold two isosceles triangles with the same bottom to bottom in the same way.

When finished, we overlap these two pieces of paper into a cross shape. After overlapping, I will insert each corner into the seam. After all the corners are inserted, our ninja darts will be finished.