3.

Apply the valley-fold of the step #2.

4.

Unfold the paper and you will find two crease lines.

Let's define the "star" point to be the top-left corner point and "heart" point to be the middle point of the right line.

Also "red-line" is given to the top line of the paper and "blue-line" for the bottom line of the paper. And the right line is defined to be the green-line.

In the next step, we will try to make the star point coincide with the blue-line while the heart point with the red-line.