import numpy as np
import matplotlib.pyplot as plt
from time import sleep

# internet
# import matplotlib.pyplot as plt
# import numpy as np

# x = np.linspace(0, 6*np.pi, 100)
# y = np.sin(x)

# # You probably won't need this if you're embedding things in a tkinter plot...
# plt.ion()

# fig = plt.figure()
# ax = fig.add_subplot(111)
# line1, = ax.plot(x, y, 'r-') # Returns a tuple of line objects, thus the comma

# for phase in np.linspace(0, 10*np.pi, 500):
#     line1.set_ydata(np.sin(x + phase))
#     fig.canvas.draw()
#     fig.canvas.flush_events()
# fin internet

x = np.arange(0, 10, 0.01)
y = np.cos(x)

plt.ion()

fig = plt.figure()
ax = fig.add_subplot(111)

# l1 = ax.plot(x, y)[0]

l = ax.plot(x, y)[0]
ax.set_xlim(0, 10)
ax.set_ylim(-2, 10)
arr = ax.arrow(0, 0, 0, 0)
for i in range(10):
    arr.remove()
    # plt.clf()
    l.set_ydata(np.cos(x+i))
    arr = ax.arrow(i, 0, 1, 1)
    fig.canvas.draw()
    fig.canvas.flush_events()
    sleep(1)

# ax = plt.axes()