import numpy as np
import matplotlib.pyplot as plt
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
x = np.linspace(-1.0, 1.0, 10)
x, y = np.meshgrid(x, x)
z = -np.hypot(x, y)
plt.axis('off')
plt.contourf(x, y, z, 10)
plt.axhline(0, color='red')
plt.axvline(0, color='red')
plt.show()