object oriented matplotlib don't plot code example

Example: matplotlib object oriented

fig, ax1 = plt.subplots()

ax1.set_ylabel("distance (m)")
ax1.set_xlabel("time")
ax1.plot(time, distance, "blue")

ax2 = ax1.twinx() # create another y-axis sharing a common x-axis


ax2.set_ylabel("velocity (m/s)")
ax2.set_xlabel("time")
ax2.plot(time, velocity, "green")

fig.set_size_inches(7,5)
fig.set_dpi(100)

plt.show()