23.a)

import random as rnd
import matplotlib.pyplot as plt


def moverse(x):
    if rnd.random() <= p:
        x += rnd.random()
    else:
        x -= rnd.random()
    return x


n = 1000
p = 0.6
x = [0]

for i in range(n):
    x.append(moverse(x[i]))

plt.plot(x)
plt.show()