pygame_keyboardMovement.py

import pygame
import sys #will use the exit function

#Loads all the main pygame modules and initializes them
pygame.init()

screen_width=640
screen_height=480

blue = (0,0,255)
white = (255,255,255)

#Create a new Surface with the dimensions listed above
screen=pygame.display.set_mode((screen_width, screen_height))

#Use this code to find all the fonts on your system, if necessary:
#for f in pygame.font.get_fonts():
#    print(f)
   
#Rect takes (left, top, width, height)
box = pygame.Rect(100,100,25,25)
boxColor = (255,0,0)

#Loop forever:
while True:
    
    screen.fill((0,0,0))
        
    #The following makes the window close when clicking the "X" or exit button
    #Without this, the window will not close, and will need to be killed
    #with the task manager
    for event in pygame.event.get():
        if event.type == pygame.QUIT: sys.exit()

    #get the state of all keyboard keys
    #This is a list of booleans; use the built-in indexes in Pygame to get
    #The value you want
    keys = pygame.key.get_pressed()
    
    #Check the arrow keys to move the box around
    if keys[pygame.K_LEFT]: box.x -= 1
    if keys[pygame.K_RIGHT]: box.x += 1
    if keys[pygame.K_UP]: box.y -= 1
    if keys[pygame.K_DOWN]: box.y += 1
        
    #render takes a string, Anti-alias? (T/F), color)
    pygame.draw.rect(screen, boxColor, box)
    
    #Output new changes to the screen
    pygame.display.flip()