[PyGame] Snake controls not working

[Windspar]

You are learning a very ugly way.
What do you want to know ? I an others will help you.
Here are some example of boiler plates.

# simple pygame boiler plate
import pygame

def main():
	pygame.init()
	pygame.display.set_caption("Simple Pygame Boiler Plate")
	screen = pygame.display.set_mode((720, 460))
	clock = pygame.time.Clock()
	
	running = True
	while running:
		for event in pygame.event.get():
			if event.type == pygame.QUIT:
				running = False
			elif event.type == pygame.KEYDOWN:
				if event.key == pygame.K_ESCAPE:
					running = False
		
		screen.fill((0,0,40))
		# draw code here
		
		pygame.display.flip()
		clock.tick(30)
		
	pygame.quit()
	
if __name__ == '__main__':
	main()

# class base boiler plate
import pygame

class Game:
	SIZE = None
	
	def __init__(self, caption, size, ):
		Game.SIZE = size
		pygame.display.set_caption(caption)		
		self.screen = pygame.display.set_mode(size)
		self.clock = pygame.time.Clock()
		
	def loop(self):
		self.running = True
		while self.running:
			for event in pygame.event.get():
				if event.type == pygame.QUIT:
					self.running = False
				elif event.type == pygame.KEYDOWN:
					if event.key == pygame.K_ESCAPE:
						self.running = False
			
			self.screen.fill((0,0,40))
			# draw code here
			
			pygame.display.flip()
			self.clock.tick(30)
			
		pygame.quit()

def main():
	pygame.init()
	game = Game('Class Boiler Plate', (720, 460))
	game.loop()
	
if __name__ == '__main__':
	main()

This is my intense boiler plate.
My Boiler Plate Github