Delem race from paper

Take a regular sheet of paper and fold it in half lengthwise. Then we bend the corners from two sides. Next, we add the bent corners so that we get a triangle, the same thing on the other side. After which the bends of the edge to the middle, on both sides. Now, on the one hand, we bend the corners inward, with the other folding along. Then we fold in half so that the tips go inward until they stop. Then, from the inside, take out the corners from two sides. And we make a spoiler.
The race can be painted as you wish Good luck !!