1, up, right, down, right, anti-left-right-swap the positions of the small squares on the two adjacent vertices above.

2. Up, Left, Down and Down-Swap the positions of the small squares on the top two diagonal vertices.

3. Top left, bottom left, top left, bottom Zuo Zuo and bottom Zuo Zuo-the small squares on the top three vertices are rotated by 120 degrees.

4. Up, left, left, left, right, down, right, down, right-exchange the small squares in the middle of the three sides in turn, while ensuring that all other small squares do not move.

Because the central block of the Rubik's cube will not change, it is used as a reference in the process of restoration.

I hope the above answers are helpful to you.