Déplacer le point E à la souris

A = (0, 0)
B = (1, 0)
poly1, a, b, c, d, C, D = Polygon(A, B, 4)
E_1 = Midpoint(a)
F_1 = Midpoint(c)
e = Segment(F_1, E_1)
G = Midpoint(e)
E = Point(Segment[E_1, G])
F = Mirror(E, G)
f = Segment(E, F)
g = Segment(A, E)
h = Segment(E, B)
i = Segment(F, C)
j = Segment(F, D)
α = Angle(B, A, E)
L: Distance[E, F] + 4 * Distance[A, E]
texte1: "L = AE + BE + CF + DF + EF = " + L + ""