from numpy import linspace, cos, pi
import matplotlib.pyplot as plt

plt.style.use("seaborn-white")
red = "#e41a1c"
green = "#4daf4a"

t = linspace(0, 4*pi, 400)
y1 = cos(t) + cos(3*t + 1) + 0.2*cos(7*t + 5)
y2 = cos(t) + cos(2*t + 1) + 0.2*cos(6*t + 5)

fig = plt.figure()

plt.subplots_adjust(hspace=0.001)

ax1 = plt.subplot(2, 1, 1)
plt.plot(t/pi, y1, lw=2, color=red)
plt.plot(t/pi, -y1, lw=2, color=red, alpha=0.3)
plt.grid(b=True)
plt.yticks([-2.5, -1.25, 0, 1.25, 2.5], [])
plt.ylim(-2.5, 2.5)

plt.subplot(2, 1, 2, sharex=ax1)
plt.plot(t/pi, y2, lw=2, color=green)
plt.plot(t/pi, -y2, lw=2, color=green, alpha=0.3)
plt.grid(b=True)
plt.xticks([0, 1, 2, 3, 4], [])
plt.yticks([-2.5, -1.25, 0, 1.25, 2.5], [])
plt.ylim(-2.5, 2.5)

plt.savefig("Symmetric_and_asymmetric_waveforms.svg", bbox_inches="tight")
plt.show()