import pygwin                                                 # Importing pygwin
import random                                                 # Importing random

win = pygwin.create('A Simple Game', (500,500))               # Creating window

player = [250,250]                                            # Player position
apple = pygwin.rect(random.randint(0,490),
              random.randint(0,490),20,20)                    # Apple rect
score = 0                                                     # Player score

run = True                                                    # Is loop running
while run:                                                    # Creating loop
    for event in pygwin.getEvents():                          # Events loop
        if event.type == pygwin.QUIT:                         # If window quit
            run = False                                       # Break loop
    win.fill((255,255,255))                                   # Fill window with color

    win.blit(score,(0,0))                                     # Writing player score

    if pygwin.keyboard.isPressed('w'):                        # If keyboard key w pressed
        player[1] -= 5                                        # Player position up
    if pygwin.keyboard.isPressed('s'):                        # If keyboard key s pressed
        player[1] += 5                                        # Player position down
    if pygwin.keyboard.isPressed('d'):                        # If keyboard key d pressed
        player[0] += 5                                        # Player position right
    if pygwin.keyboard.isPressed('a'):                        # If keyboard key a pressed
        player[0] -= 5                                        # Player position left

    if player[0] <= -10:                                      # If player out of the screen (left)
        player[0] = 510                                       # Set player position in right
    if player[1] <= -10:                                      # If player out of the screen (up)
        player[1] = 510                                       # Set player position in down
    if player[0] > 510:                                       # If player out of the screen (right)
        player[0] = -10                                       # Set player position in left
    if player[1] > 510:                                       # If player out of the screen (down)
        player[1] = -10                                       # Set player position in up

    playerRect = pygwin.rect(player[0]-10,player[1]-10,20,20) # Player rect
    win.draw.rect((0,0,0),playerRect)                         # Drawing player rect
    win.draw.rect((200,50,50),apple)                          # Drawing apple rect

    if playerRect.collide(apple):                             # If player rect collide apple rect
        apple = pygwin.rect(random.randint(0,490),
                      random.randint(0,490),20,20)            # Change apple rect
        score += 1                                            # Update player score

    win.update(60)                                            # Update window
pygwin.close()                                                # Close pygwin