import pygame, sys, time, math
from pygame.locals import *

pygame.init()

displaysurface = pygame.display.set_mode((1920,1080))
background = pygame.Surface((1920,1080))
tag = 255

mySurface = pygame.Surface((41,41))
mySurface.fill((tag,255-tag,0))

mySurface2 = pygame.Surface((41,41))
mySurface2.fill((255-tag,tag,0))
k = 0
base_font = pygame.font.Font(None, 32)

pos1 = [940, 520]
pos2 = [0, 0]
direction = 90
ddirection = 0

while True:
    zombiespeed = 10

    xdist = pos1[0] - pos2[0]
    ydist = pos1[1] - pos2[1]
    dist = abs(xdist) + abs(ydist)
    pos2[0] += xdist / dist * zombiespeed/17
    pos2[1] += ydist / dist * zombiespeed/17

    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()

        key = pygame.key.get_pressed()
        if key[pygame.K_LEFT]:
            ddirection = 2
        if key[pygame.K_RIGHT]:
            ddirection = -2
        if not (key[pygame.K_LEFT] or key[pygame.K_RIGHT]):
            ddirection = 0

    direction += ddirection / 500
    pos1[0] += math.sin(direction) / 2
    pos1[1] += math.cos(direction) / 2

    if pos1[0] > 1880:
        break
    if pos1[0] < 0:
        break
    if pos1[1] > 1040:
        break
    if pos1[1] < 0:
        break

    rect1 = mySurface.get_rect(topleft=pos1)
    rect2 = mySurface2.get_rect(topleft=pos2)

    if rect1.colliderect(rect2):
        break

    displaysurface.blit(background, (0,0))
    displaysurface.blit(mySurface, pos1)
    displaysurface.blit(mySurface2, pos2)

    k += 1

    user_text = str(k / 1000) + "s"
    text_surface = base_font.render(user_text, True, (0, 255, 0))
    displaysurface.blit(text_surface, (10, 10))

    pygame.display.update()

displaysurface.blit(background, (0,0))
base_font = pygame.font.Font(None, 100)
user_text = "Game over! Your final time: " + str(k / 1000) + "s"
text_surface = base_font.render(user_text, True, (255, 255, 255))
displaysurface.blit(text_surface, (400, 520))

pygame.display.update()
time.sleep(3)