Area and perimeter of rectangle

#imports modules from libraries
from turtle import *
from random import randint
import random

bob = Turtle()  #Creates a turtle
col = ["Red", "Green", "Blue", "Pink"]  #Creates a list and assigns values

def area(l, h):   #defines a function which calculates the area of a triangle
  a = l * h       #multiples the length by height and stores in a variable
  return a        #returns the area

def perimeter(l, h):
  p = (l + h)* 2
  return p

def randomplace():    #defines a function called randomplace
  x = randint(-200, 200)   #creates a variable and assigns a random integer
  y = randint(-200, 200)   #creates a variable and assigns a random integer
  bob.goto(x,y)

def center_rectangle(l, h):     #defines a function that returns the
  bob.right(90)
  bob.forward(l/2)              #moves the turtle forward half the length of the rectangle
  bob.right(90)
  bob.forward(h/2)              #moved the turtle forward half the width of the rectangle



def draw_rect(l, h, cols):  #defines a function and passes in three parameters
  hideturtle()              #hides the turtle from view
  bob.penup()                   #the pen is not currently drawing
  randomplace()             #calls the randomplace function to select random coordinates
  bob.pendown()
  bob.fillcolor(cols)        #selects random colour from cols list
  bob.begin_fill()           #fills in shape with selected colour
  bob.forward(l)             #Moves the turtle forward a random number which has been passed in
  bob.right(90)              #turns the turtle a 90 degrees angle is it is pointing the correct way
  bob.forward(h)             #moves the turtle forward a random number which has been passed in
  bob.right(90)
  bob.forward(l)
  bob.right(90)
  bob.forward(h)
  bob.end_fill()              #end the fill colour
  bob.penup()
  center_rectangle(l, h)      #calls a fuction which will return the turtle to the center of the rectangle
  bob.pendown()
  bob.color("black")          #wrties text in black
  bob.write("Area: " + str(area(l, h)) + "\nPerimeter:" + str(perimeter(l, h)))  #prints the area and perimeter
  bob.penup()

for i in range(5):          #for loop which repeats 10 times
  draw_rect(random.randint(-100,100), random.randint(-100, 100), random.choice(col))
#calls the draw_rect function and passess in three parameters