flyimg | Dockerized PHP application to resize and crop images | Computer Vision library

I've been learning python and just started to play with coding in Pygame. My current program is a game in which the character is a fly, who must avoid being killed by a fly swatter. The game must first randomly display a translucent yellow square anywhere on the screen. This square represents where the swatter will strike in 2 seconds, giving the player time to fly out of that strike area. When the swatter strikes, I want to blit an opaque square to the game in the exact location of the fainter square. This square will kill the player if they are within it when it appears. Although I plan on displaying messages and adding other things of this nature, the opaque square(or the swatter strike) should terminate the game session. I have already created both of the squares, but I need the opaque one to come after the translucent one, and in the same location. After each strike i'd like the squares to disappear and the process to repeat. if anyone has any insight as to how I could go about 1) blitting the translucent square in a random location and 2) having the darker square "strike" that same location in 2 seconds, and then disappear and repeat, I would be extremely grateful. I have tried using the time.sleep() function and it has not worked. Many thanks!!

(please excuse my somewhat messy code!)