Python turtle collision detection

[bob pan]

Can you help me make a collision detection for Python turtle where it will say game over when the yellow circle hits the green pipe

import turtle
import random
import datetime

# this will set the current time to now
current_time = datetime.datetime.now()
score_time = datetime.datetime.now()

panel = turtle.Screen()
panel.bgcolor("light blue")
panel.title("𝙵𝚕𝚊𝚙𝚙𝚢 𝙲𝚒𝚛𝚌𝚕𝚎")
panel.setup(width=1080, height=720)
panel.tracer(0)

human = turtle.Turtle()
human.color("yellow")
human.shape("circle")
human.penup()
human.goto(0, 0)
human.shapesize(5, 5)
speed = 0
score = 0

display = turtle.Turtle()
display.write(str(score), align='center', font=("Fixedsys", 40))
display.penup()
display.goto(0, 200)
pipes = []

def create_pipes():

   x = 550
   y = random.randint(300, 500)
   pipe_up = turtle.Turtle()
   pipe_up.shape("square")
   pipe_up.color("green")
   pipe_up.shapesize(20, 3)
   pipe_up.penup()
   pipe_up.goto(x, y)
   #pipe_up.setheading(human.heading() - 180)
   pipes.append(pipe_up)
   y = random.randint(-330, -200)
   pipe_down = turtle.Turtle()
   pipe_down.shape("square")
   pipe_down.color("green")
   pipe_down.shapesize(20, 3)
   pipe_down.penup()
   pipe_down.goto(x, y)
   #pipe_down.setheading(human.heading() - 180)
   pipes.append(pipe_down)


def fly():
 global speed
 speed = -1


panel.listen()
panel.onkeypress(fly, "space")


# forever
while True:

   # if passed 2 seconds
   if (datetime.datetime.now() - current_time).total_seconds() > 2:
       # do something
       create_pipes()
       # update current_time to now
       current_time = datetime.datetime.now()

       if pipes[0].xcor() < 0:
           score+=1
       display.clear()
       display.write(str(score), align='center', font=("Fixedsys", 40))
       display.penup()


   for i in pipes:
       i.setx(i.xcor() - 1)

   panel.update()
   speed += 0.0035
   human.setheading(-90)
   human.forward(speed)


   if human.xcor() > 500:
       human.setx(500)
   if human.xcor() < -500:
       human.setx(-500)

   if human.ycor() > 330:
       human.sety(330)
   if human.ycor() < -330:
       human.sety(-330)