Python Pygame help pause event

[Trajme]

Here is my current code, i am trying to make a pause event so when the user presses P the game will pause and when the user presses C the game will continue, can someone please show me how they would add onto this code?





import turtle
import os
import math
import random

#set up the screen
wn = turtle.Screen()
wn.bgcolor("black")
wn.title("Space invaders")
wn.bgpic("space_invaders_backgrounds.gif")

#Register the shapes
turtle.register_shape("ship.gif")
turtle.register_shape("Enemy.gif")

#Drawing my border
border_pen = turtle.Turtle()
border_pen.speed(0)
border_pen.color("white")
border_pen.penup()
border_pen.setposition(-300,-300)
border_pen.pendown()
border_pen.pensize(3)
for side in range(4):
border_pen.fd(600)
border_pen.lt(90)
border_pen.hideturtle()

#Set the score to 0
score = 0

#Draw the score
score_pen = turtle.Turtle()
score_pen.speed(0)
score_pen.color("white")
score_pen.penup()
score_pen.setposition(-290, 280)
scorestring = "Score: %s" %score
score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))
score_pen.hideturtle()


#create the player turtle
player = turtle.Turtle()
player.color("blue")
player.shape("ship.gif")
player.penup()
player.speed(0)
player.setposition(0, -250)
player.setheading(90)

playerspeed = 18

#Choose a number of enemies
number_of_enemies = 6
#Create and empty list of enemies
enemies =

#Add enemies to the list
for i in range(number_of_enemies):
#Create the enemy
enemies.append(turtle.Turtle())


for enemy in enemies:
enemy.color("red")
enemy.shape("Enemy.gif")
enemy.penup()
enemy.speed(0)
x = random.randint(-200, 200)
y = random.randint(100, 250)
enemy.setposition(x,y)

enemyspeed = 3

#Create the player's bullet
bullet = turtle.Turtle()
bullet.color("yellow")
bullet.shape("triangle")
bullet.penup()
bullet.speed(0)
bullet.setheading(90)
bullet.shapesize(0.5, 0.5)
bullet.hideturtle()

bulletspeed = 25

#Define bullet state
#ready - ready to fire
#fire - bullet is firing
bulletstate = "ready"


#Move the player left and right
def move_left():
x = player.xcor()
x -= playerspeed
if x < -280:
x = - 280
player.setx(x)

def move_right():
x = player.xcor()
x += playerspeed
if x > 280:
x = 280
player.setx(x)

def fire_bullet():
#Declare bulletstate as a global if needs changing
global bulletstate
if bulletstate == "ready":
bulletstate = "fire"
#Move the bullet just above the player
x = player.xcor()
y = player.ycor() + 10
bullet.setposition(x,y)
bullet.showturtle()

def isCollision(t1, t2):
distance = math.sqrt(math.pow(t1.xcor()-t2.xcor(),2)+math.pow(t1.ycor()-t2.ycor(),2))
if distance < 15:
return True
else:
return False




#Create keyboard bindings
turtle.listen()
turtle.onkey(move_left,"Left")
turtle.onkey(move_right,"Right")
turtle.onkey(fire_bullet,"space")

#Main game loop
while True:

for enemy in enemies:
#Move the enemy
x = enemy.xcor()
x += enemyspeed
enemy.setx(x)

#Move the enemy back and down
if enemy.xcor() > 280:
#Move all enemies down
for e in enemies:
y = e.ycor()
y -= 40
e.sety(y)
#Change the enemy direction
enemyspeed *= -1

if enemy.xcor() < -280:
#Move all enemies down
for e in enemies:
y = e.ycor()
y -= 40
e.sety(y)
#Change enemy direction
enemyspeed *= -1

#Check for a collision between the bullet and the enemy
if isCollision(bullet, enemy):
#Reset the bullet
bullet.hideturtle()
bulletstate = "ready"
bullet.setposition(0, -400)
#Reset the enemy
x = random.randint(-200, 200)
y = random.randint(100, 250)
enemy.setposition(x,y)
#Update the score
score += 10
scorestring = "Score: %s" %score
score_pen.clear()
score_pen.write(scorestring, False, align="left", font=("Arial", 14, "normal"))

if isCollision(player, enemy):
player.hideturtle()
enemy.hideturtle()
print("Game over")
break

#Move the bullet
if bulletstate == "fire":

y = bullet.ycor()
y += bulletspeed
bullet.sety(y)

#Check to see if the bullet has gone to the top
if bullet.ycor() > 275:
bullet.hideturtle()
bulletstate = "ready"



delay = input("press enter to finish")

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Any help?