import cv2
import numpy as np

img1 = np.zeros((250, 500, 3), np.uint8)
img1 = cv2.rectangle(img1, (200,0), (300, 100), (255, 255, 255), -1)
img2 = cv2.imread("image_1.png")

cv2.imshow("img1", img1)
cv2.imshow("img2", img2)

cv2.waitKey(0)
cv2.destroyAllWindows()