Improve this code and add 2 player one for wasd and one for arrow keys

Here is an improved code with two players, one for WASD and one for arrow keys:

import pygame

# initialize pygame
pygame.init()

# set up the screen
screen_width = 800
screen_height = 600
screen = pygame.display.set_mode((screen_width, screen_height))
pygame.display.set_caption("Two Player Game")

# set up the clock
clock = pygame.time.Clock()

# set up the players
player1_x = screen_width // 4
player1_y = screen_height // 2
player1_speed = 5
player1_color = (255, 0, 0)

player2_x = 3 * screen_width // 4
player2_y = screen_height // 2
player2_speed = 5
player2_color = (0, 0, 255)

# set up the game loop
running = True
while running:
    # handle events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # handle player 1 movement
    keys = pygame.key.get_pressed()
    if keys[pygame.K_a]:
        player1_x -= player1_speed
    elif keys[pygame.K_d]:
        player1_x += player1_speed
    elif keys[pygame.K_w]:
        player1_y -= player1_speed
    elif keys[pygame.K_s]:
        player1_y += player1_speed

    # handle player 2 movement
    if keys[pygame.K_LEFT]:
        player2_x -= player2_speed
    elif keys[pygame.K_RIGHT]:
        player2_x += player2_speed
    elif keys[pygame.K_UP]:
        player2_y -= player2_speed
    elif keys[pygame.K_DOWN]:
        player2_y += player2_speed

    # keep players within the screen bounds
    player1_x = max(0, min(player1_x, screen_width))
    player1_y = max(0, min(player1_y, screen_height))
    player2_x = max(0, min(player2_x, screen_width))
    player2_y = max(0, min(player2_y, screen_height))

    # draw the players
    screen.fill((255, 255, 255))
    pygame.draw.circle(screen, player1_color, (player1_x, player1_y), 20)
    pygame.draw.circle(screen, player2_color, (player2_x, player2_y), 20)
    pygame.display.flip()

    # set the frame rate
    clock.tick(60)

# quit pygame
pygame.quit()

In this code, we added a second set of movement controls for player 2 using the arrow keys. We also adjusted the positions and speeds of the players to make the game more balanced. Additionally, we added code to ensure that the players stay within the screen bounds