Introduction - If you have any usage issues, please Google them yourself
The first iteration rotates the vectors the second or third quadrant to the first or fourth, respectively. The shift sequence is 0,0,1, and 2. The rotation angle of the first four steps becomes: arctan(∞) = 90◦ , arctan(20) = 45◦ , arctan(2− 1) = 26.5◦ , and arctan(2− 2) = 14◦ .