Use an array to animate and track multiple objects
Course- Python >
# Import a library of functions called 'pygame'import pygameimport random# Initialize the game enginepygame.init()BLACK = [0, 0, 0]WHITE = [255, 255, 255]# Set the height and width of the screenSIZE = [400, 400]screen = pygame.display.set_mode(SIZE)pygame.display.set_caption("Snow Animation")# Create an empty arraysnow_list = []# Loop 50 times and add a snow flake in a random x,y positionfor i in range(50): x = random.randrange(0, 400) y = random.randrange(0, 400) snow_list.append([x, y])clock = pygame.time.Clock()# Loop until the user clicks the close button.done = Falsewhile not done: for event in pygame.event.get(): # User did something if event.type == pygame.QUIT: # If user clicked close done = True # Flag that we are done so we exit this loop # Set the screen background screen.fill(BLACK) # Process each snow flake in the list for i in range(len(snow_list)): # Draw the snow flake pygame.draw.circle(screen, WHITE, snow_list[i], 2) # Move the snow flake down one pixel snow_list[i][1] += 1 # If the snow flake has moved off the bottom of the screen if snow_list[i][1] > 400: # Reset it just above the top y = random.randrange(-50, -10) snow_list[i][1] = y # Give it a new x position x = random.randrange(0, 400) snow_list[i][0] = x # Go ahead and update the screen with what we've drawn. pygame.display.flip() clock.tick(20)# Be IDLE friendly. If you forget this line, the program will 'hang'# on exit.pygame.quit()