import pygame
from pygame.locals import *
import sys

pygame.init()
display = pygame.display.set_mode((300, 300))
FPS_CLOCK = pygame.time.Clock()

while True:
    for event in pygame.event.get() :
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    if event.type == pygame.MOUSEBUTTONDOWN :
        mouse_presses = pygame.mouse.get_pressed()
        if mouse_presses[0] :
            print( "Left Mouse Key was clicked" )

    pygame.display.update()
    FPS_CLOCK.tick(30)