#!/usr/bin/env python3
#
import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
#
fig,ax=plt.subplots(figsize=(10,6))
ax.set(ylim=(-1,1))
#
def func(x):
  return np.sin(8*x)*np.exp(-0.1*x)
#
x=np.arange(0,10,0.01)
line,=ax.plot(x,func(x))
#
def animate(i):
  xx=x+i/100
  line.set_xdata(xx)
  line.set_ydata(func(xx))
  ax.set(xlim=(xx[0],xx[999]))
  return line,
#
ani=animation.FuncAnimation(fig,animate,interval=20) 
plt.show()