import matplotlib.pyplot as plt
import numpy as np
import random

plt.rcParams["figure.figsize"] = [7.50, 3.50]
plt.rcParams["figure.autolayout"] = True

x = np.linspace(1, 10, 100)
y = np.sin(x)
fig, ax = plt.subplots()

for i in range(0, 100, 5):
   r = random.random()
   b = random.random()
   g = random.random()
   color = (r, g, b)
   ax.plot(x[i:i+5+1], y[i:i+5+1], c=color, lw=7)

plt.show()