How to blit text on a window with Pygame

import pygame



class Color:
	green = (0, 255, 0)


class Font:
	''' definition of type of fonts '''
	pygame.font.init()
	little = pygame.font.SysFont("Arial", 48)
	big = pygame.font.SysFont("Arial", 192)


class Text:
	''' definition of text with rendering method '''
	def text_render(font, text, color):
		return font.render(text, 1, color)

	def show_text():
		screen.blit(Text.hello, (0, 0))
		screen.blit(Text.World, (0, 200))
	hello = text_render(Font.big, "Hello", Color.green)
	World = text_render(Font.little, "World", Color.green)


def monitor_size():
	''' return width and height of the monitor screen '''
	info = pygame.display.Info()
	return info.current_w, info.current_h

def mainloop():
	''' main loop to show stuff on the screen '''
	while True:
		for event in pygame.event.get():
			if event.type == pygame.QUIT:
				pygame.quit()
		Text.show_text()
		clock.tick(60)
		pygame.display.update()


pygame.init()
w, h = monitor_size()
screen = pygame.display.set_mode((w - 100, h - 100), pygame.RESIZABLE)
clock = pygame.time.Clock()
mainloop()