Load multiple images with a time interval to overlay an object in a webcam feed

Question

I'm trying to load several images from a folder so that they are processed in an exact same manner. The code below detects a blue object in webcam feed and overlays it with the template image img where the webcam frame is im0

            hsv = cv2.cvtColor(im0, cv2.COLOR_BGR2HSV)
            mask = cv2.inRange(hsv, (0, 120, 120), (180, 255, 255))#<- blue # RED: (0, 120, 120), (10, 255, 255)) 
            thresh = cv2.dilate(mask, None, iterations=2)
            contours = cv2.findContours(thresh.copy(), cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

            contours = contours[0]
            for contour in contours:

                x, y, w, h = cv2.boundingRect(contour)
                                    
                height = 480
                width = 640
                                    
                if y + h < height and x + w < width:
                    
                    
                    logo = cv2.resize(img, (w, h))
                    img2gray = cv2.cvtColor(logo, cv2.COLOR_BGR2GRAY)
                    _, logo_mask = cv2.threshold(img2gray, 1, 255, cv2.THRESH_BINARY)
                    roi = im0[y:y+h, x:x+w]
                    roi[np.where(logo_mask)] = 0
                    roi += logo
            cv2.imshow(str(p), im0)#im0 2
            cv2.waitKey(1)  # 1 millisecond

I am wondering how should I create a timer here so that the exact same processing happens to the img2, img3 and so on?