NO 61. L'échiquier
Author: Frédéric Chanez

A = Intersect(xAxis, yAxis)
C = Point(yAxis)
c = 3 (slider from 1 to 8, step 1)
D = (-4.9124185609203, 4.605234223770807)
E = Point(Circle[D, c])
b = Segment(D, E)
poly1, d, e, c_1, f, F, G = Polygon(D, E, 4)
B = (8.05, 0)