import pygame, sys

pygame.init()

display = pygame.display.set_mode((300,300))
display.fill((255,255,255))

# Drawing a rectangle with rounded corners on the display surface using Pygame's draw.rect() function.
pygame.draw.rect(display, (0,0,255), (40,80,200,80), width=0, border_radius=20)
# display: The surface to draw the rectangle on.
# (0, 0, 255): The color of the rectangle in RGB format, here it represents blue color.
# (40, 80, 200, 80): The bounding rectangle for the rectangle with rounded corners.
#                    It defines the position and dimensions of the rectangle.
#                    The parameters represent (left, top, width, height) of the rectangle.
#                    Here, the rectangle is positioned at (40, 80) with a width of 200 pixels
#                    and a height of 80 pixels.
# width=0: The width of the outline of the rectangle. 
#          Setting it to 0 means that the rectangle will be filled with the specified color.
# border_radius=20: The radius of the rounded corners of the rectangle. 
#                   Here, it's set to 20 pixels.

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            sys.exit()

    pygame.display.update()