I am trying to make an object randomly spawn into my game for a period of time and when my character walks over the object it despawns

I cant figure out how to randomly spawn in objects and make them wait despawn after a period of time, or when my sprite touches the object it despawns.

I tried adding in a import random but not sure what to do next

randomPos = 0 waitTime = 0

randomPos = random.randint(0,900)

global randomPos

pygame.draw.circle(win,(0,0,0),(randomPos, 480), 10)

This is the lines of code I have added into my code to try make it

The circle object just blinks randomly across my screen spawns and despawns, not sure what to do