You can only move the squares.
Move them by sliding, and touch to rotate.
The fan shape is made by joining the radius of a circle with an arc to a second radius.
Hint 1
You need to rotate the squares.
Hint 2
Use the curves at the top and bottom to make two of the fan shapes.
Hint 3
Use the curves at the left and right to make two more fan shapes.
Super Hint
Line up the squares on the left and right.
Answer for 'Fantastic'
The answer is as follows.