import pygame

# Homework: move a rectangle with WASD keys but stop it at the screen edges.
# The rectangle is 50x50. Use pygame.key.get_pressed() to read held keys.
# After updating the position, clamp it so it cannot go outside the window.
# Hint: use max() and min() to clamp a value.
#   x = max(0, min(x, screen_width - rect_width))

pygame.init()

screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Bounded Move")
clock = pygame.time.Clock()

BG    = (20, 20, 20)
GREEN = (60, 180, 80)

SIZE  = 50
x = 295
y = 215
speed = 4

running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    keys = pygame.key.get_pressed()
    # TODO: move x left/right with A/D keys
    # TODO: move y up/down with W/S keys
    # TODO: clamp x so the rect stays inside 0 to 640-SIZE
    # TODO: clamp y so the rect stays inside 0 to 480-SIZE

    screen.fill(BG)
    pygame.draw.rect(screen, GREEN, (x, y, SIZE, SIZE))
    pygame.display.flip()
    clock.tick(60)

pygame.quit()