I couldn’t get your code to work, but hopefully this will help:
import matplotlib
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(111)
rect1 = matplotlib.patches.Rectangle((-200,-100), 400, 200, color="yellow")
rect2 = matplotlib.patches.Rectangle((0,150), 300, 20, color="red")
rect3 = matplotlib.patches.Rectangle((-300,-50), 40, 200, color="#0099FF")
circle1 = matplotlib.patches.Circle((-200,-250), radius=90, color="#EB70AA")
ax.add_patch(rect1)
ax.add_patch(rect2)
ax.add_patch(rect3)
ax.add_patch(circle1)
plt.xlim([-400, 400])
plt.ylim([-400, 400])
plt.show()
produces: