""" moveBox.py
    illustrates basic motion
    in the IDEA/ALTER framework
    moves a rect across the screen """

#Initialize
import pygame
pygame.init()

#Display
screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("move a box")

#Entities
#yellow background
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((255, 255, 0))

#make a red 25 x 25 box
box = pygame.Surface((25, 25))
box = box.convert()
box.fill((255, 0, 0))

# set up some box variables
box_x = 0
box_y = 200

#ACTION

    #Assign 
clock = pygame.time.Clock()
keepGoing = True

    #Loop
while keepGoing:

    #Time
    clock.tick(30)

    #Events
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            keepGoing = False

    #modify box value
    box_x += 5
    #check boundaries
    if box_x > screen.get_width():
        box_x = 0

    #Refresh screen
    screen.blit(background, (0, 0))
    screen.blit(box, (box_x, box_y))
    pygame.display.flip()