title: Make an Image move one space with arrow keys in python / pygame
body: <p>I am trying to create a game where "player_one.png" is controlled by the arrow keys to move around and dodge a bunch of randomly placed "player_two.png" that can move around on their own  in random directions on a football field. </p>
  
  <p>I have created a program that displays the field and the two images. I am having difficulty getting "player_two.png" display multiple copies on the field and cannot get them to move. </p>
  
  <p>I also cannot get the "player_one.png" image to move based on the arrow key. I found a program using Sprites that moves a red block in the same way I want my player to move but cannot switch out the sprite with my image.</p>
  
  <p>Here is my initial set-up which displays the field and the two images facing each other. </p>
  
  <pre><code>import pygame
  import random
  pygame.init()
  
  #colors
  black = (0, 0, 0)
  white = (255, 255, 255)
  green = (0, 100, 0)
  red = (255, 0, 0)
  
  
  size = [1000, 500]
  screen = pygame.display.set_mode(size)
  
  pygame.display.set_caption("Tony's newest game attempt")
  
  
  #boolean for while loop
  done = False
  
  #create clock 
  clock = pygame.time.Clock()
  
  #declare font
  font = pygame.font.Font(None, 25)
  
  player_one = pygame.image.load("player_one.png").convert()
  player_one.set_colorkey(white)
  
  player_two = pygame.image.load("player_two.png").convert()
  player_two.set_colorkey(white)
  
  while done == False:
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              done = True             
  
  
      screen.fill(green)
  
      for x in range(60,940,35):
          pygame.draw.line(screen, white, [x, 0], [x, 500], 1)
  
  
      score = 0
      text = font.render("Score:" +str(score), True, black)
  
      screen.blit(text, [0, 0])
      screen.blit(player_one, [940, 240])
  
      screen.blit(player_two, [60, 240])
  
  
      pygame.display.flip()
  
      clock.tick(20)
  
  pygame.quit()
  </code></pre>
  
  <p>The sprite program that uses a class (something I could not get to work with images) moves the Player sprite using this code: (Please note this is not the entire program).</p>
  
  <pre><code>class Player(pygame.sprite.Sprite):
      # Constructor function
      def __init__(self, color, x, y):
          # Call the parent's constructor
          pygame.sprite.Sprite.__init__(self)
  
          # Set height, width
          self.image = pygame.Surface([35, 35])
          self.image.fill(color)
  
          # Make our top-left corner the passed-in location.
          self.rect = self.image.get_rect()
          self.rect.x = 930
          self.rect.y = 250
  
      def reset_player(self):
          self.rect.x = 930
          self.rect.y = 250
  
      # Find a new position for the player
      def update(self):
          self.rect.x += self.change_y
          self.rect.y += self.change_x
  
  while done == False:
  
      for event in pygame.event.get():
          if event.type == pygame.QUIT:
              done=True
  
          elif event.type == pygame.KEYDOWN:
              if event.key == pygame.K_LEFT:
                  player.rect.x -= player.rect.width
              elif event.key == pygame.K_RIGHT:
                  player.rect.x += player.rect.width
              elif event.key == pygame.K_UP:
                  player.rect.y -= player.rect.height
              elif event.key == pygame.K_DOWN:
                  player.rect.y += player.rect.height
  
  
      # -- Draw everything
      # Clear screen
      screen.fill(green)
  
      for x in range(60,940,35):
          pygame.draw.line(screen, white, [x, 0], [x, 500], 1)
  
  
      # Draw sprites  
      all_sprites_list.draw(screen)
  
      text = font.render("Score: "+str(score), True, black)
      screen.blit(text, [10, 10])
  
  
      # Flip screen   
      pygame.display.flip()
  
      # Pause
      clock.tick(20)  
  
  pygame.quit()
  </code></pre>
  
  <p>Can someone please help me figure out how to get my image to move the way the sprite does. Or help me display "player_two.png" all over the field and move in random directions. It would be best if the "player_two.png" moved every once every 3 times I hit an arrow key. If this is vague please email me and I can send my code. I need to finish this game in 2 weeks! </p>