=

a = 3.4 (slider from 1 to 4, step 0.01)
InputBox1 = Textfield(a)
f(x) = (((-a) * x) * (x - 1))
base = Segment((0, 0), (1, 0))
A = Point(base)
N = 15 (slider from 1 to 30, step 1)
g(x) = x
A1: x(A)
B1: y(A)
A2: x(A)
B2: f(A2)
A3: B2
B3: f(A3)
A4: B3
B4: f(A4)
A5: B4
B5: f(A5)
A6: B5
B6: f(A6)
A7: B6
B7: f(A7)
A8: B7
B8: f(A8)
A9: B8
B9: f(A9)
A10: B9
B10: f(A10)
A11: B10
B11: f(A11)
A12: B11
B12: f(A12)
A13: B12
B13: f(A13)
A14: B13
B14: f(A14)
A15: B14
B15: f(A15)
A16: B15
B16: f(A16)
A17: B16
B17: f(A17)
A18: B17
B18: f(A18)
A19: B18
B19: f(A19)
A20: B19
B20: f(A20)
A21: B20
B21: f(A21)
A22: B21
B22: f(A22)
A23: B22
B23: f(A23)
A24: B23
B24: f(A24)
A25: B24
B25: f(A25)
A26: B25
B26: f(A26)
A27: B26
B27: f(A27)
A28: B27
B28: f(A28)
A29: B28
B29: f(A29)
A30: B29
B30: f(A30)
B: (A2, B2)
C: (A3, B3)
D: (A4, B4)
E: (A5, B5)
F: (A6, B6)
G: (A7, B7)
H: (A8, B8)
I: (A9, B9)
J: (A10, B10)
K: (A11, B11)
L: (A12, B12)
M: (A13, B13)
O: (A14, B14)
P: (A15, B15)
Q: (A16, B16)
R: (A17, B17)
S: (A18, B18)
T: (A19, B19)
U: (A20, B20)
V: (A21, B21)
W: (A22, B22)
Z: (A23, B23)
A_1: (A24, B24)
B_1: (A25, B25)
C_1: (A26, B26)
D_1: (A27, B27)
E_1: (A28, B28)
F_1: (A29, B29)
G_1: (A30, B30)
L_1: {B, C, D, E, F, G, H, I, J, K, L, M, O, P, Q, R, S, T, U, V, W, Z, A_1, B_1, C_1, D_1, E_1, F_1, G_1}