import pygame, sys

pygame.init()
winSize = (800, 600)
screen = pygame.display.set_mode(winSize)

#Load font and render text
myriadProFont = pygame.font.SysFont('Myriad Pro', 48)
helloWorld = myriadProFont.render('Hello World!', 1, (255, 0, 255), (255, 255, 255))

while True:

    #Keep screen open and let user exit window using for loop
    for ev in pygame.event.get():
        if ev.type == pygame.QUIT:
            sys.exit()

    screen.blit(helloWorld, (0, 0))
    pygame.display.update()