import numpy as np
import matplotlib.pyplot as plt 
from mpl_toolkits.mplot3d import Axes3D
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

x = [1,2,3,4,5,6,7]
y = [1,1,1,1,1,1,1]
z = [2,4,6,8,10,12,14]

x2 = [1,2,3,4,5,6,7]
y2 = [1,1,1,1,1,1,1]
z2 = [1,3,5,7,9,11,13]

ax.plot(x, y, z)
ax.plot(x2, y2, z2, color='orange')

plt.show()