[Python] Can someone fix my code? Rectangles not showing up

I'm trying to create two rectangles as an obstacle and a finish. The player rectangle is square_pos, the obstacle rectangle is wall_pos, and the finish rectangle is finish_pos.

import pygame
import random
pygame.init()
screen = pygame.display.set_mode((1280, 720))
clock = pygame.time.Clock()
random_pos = random.randint(280, 1000)
random_size = random.randint(75, 250)
square_pos = pygame.Rect(640, 360, 25, 25)
wall_pos = pygame.Rect(random_pos, random_pos, random_size, random_size)
finish_pos = pygame.Rect(random_pos, random_pos, 25, 25)
collide = pygame.Rect.colliderect(square_pos,wall_pos)
collidefinish = pygame.Rect.colliderect(square_pos,finish_pos)
while True:
if pygame.event.get(pygame.QUIT): break
keys = pygame.key.get_pressed()
if keys[pygame.K_UP]:
square_pos.y -= 20
if keys[pygame.K_DOWN]:
square_pos.y += 20
if keys[pygame.K_LEFT]:
square_pos.x -= 20
if keys[pygame.K_RIGHT]:
square_pos.x += 20
if collide:
if keys[pygame.K_UP]:
square_pos.y += 20
if keys[pygame.K_DOWN]:
square_pos.y -= 20
if keys[pygame.K_LEFT]:
square_pos.x += 20
if keys[pygame.K_RIGHT]:
square_pos.x -= 20
if collidefinish:
square_pos.move_rectangle(640, 360)
rectangles[wall_pos, finish_pos].alive = False
wall_pos = pygame.Rect(random_pos, random_pos, random_size, random_size)
finish_pos = pygame.Rect(random_pos, random_pos, 25, 25)
while collide == True:
square_pos.move_rectangle(640, 360)
rectangles[wall_pos, finish_pos].alive == False
wall_pos = pygame.Rect(random_pos, random_pos, random_size, random_size)
finish_pos = pygame.Rect(random_pos, random_pos, 25, 25)
if collide == False: break
if collidefinish == False: break
while collidefinish == True:
square_pos.move_rectangle(640, 360)
rectangles[wall_pos, finish_pos].alive == False
wall_pos = pygame.Rect(random_pos, random_pos, random_size, random_size)
finish_pos = pygame.Rect(random_pos, random_pos, 25, 25)
if collide == False: break
if collidefinish == False: break
screen.fill("black")
pygame.draw.rect(screen, "red", square_pos)
pygame.display.flip()
clock.tick(60)
pygame.quit()


The two rectangles were supposed to show up. If any intersected with the player, they would be replaced.

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