"""
This program displays the plots of the costs of a track rental 
in four different companies.

"""
import math
import random
import turtle


t = turtle.Turtle()
wn = turtle.Screen()
wn.title("Track Rentals")

# set the dimensions of the window
wn.setup(600, 600)

# constrain the coordinate system so that it represents a 1 x 1 plane
wn.setworldcoordinates(-10, -10, 200, 200)

# turn animation off
wn.tracer(0)




t.up()

#draw the coordinates 

t.pencolor("black")
t.goto(-10, 0)
t.pendown()
t.forward(210) 
t.up()
t.goto(0, -10)
t.left(90)
t.pendown()
t.forward(210)
t.up()
t.goto(-5,-9) 
t.write("0", font=("Arial", 16, "normal"))
t.up() 




#plot the function for watertown track rental
# w(m) = 79.00
t.pencolor("green")  
m = 0.0
while m  < 200: 
    w = 79.00 
    t.goto(m,w)
    t.dot() 
    if m == 160:
        t.goto(m,w+3)
        t.write("Watertown", font=("Arial", 16, "normal"))
    m = m + 1    


#plot the function for U-Haul track rental
# h(m) = 29.99 + 1.39*m
t.pencolor("red")  
m = 0.0
while m  < 200: 
    h = 29.99 + 1.39 * m  
    t.goto(m,h)
    t.dot() 
    if m == 100:
        t.goto(m-25,h)
        t.write("U-Haul", font=("Arial", 16, "normal"))
    m = m + 1 
    
    
 
#plot the function for Budget track rental
# b(m) = 29.99 + 1.39*m
t.pencolor("orange")  
m = 0.0
while m  < 200: 
    b = 29.99 +  0.99 * m
    t.goto(m,b)
    t.dot() 
    if m == 150:
        t.goto(m+10,b)
        t.write("Budget", font=("Arial", 16, "normal"))
    m = m + 1 
    
   
 
#plot the function for Enterprise track rental
# e(m) = 59.99 if m < 100 
#      = 59.99 + 0.59*m if m > 100 
t.pencolor("blue")  
m = 0.0
while m  < 200: 
	if m < 100 :	
		e = 59.99 
	else :
		e = 59.99 +  0.59 * (m - 100)
	
	t.goto(m,e)
	t.dot() 
	if m == 160:
		t.goto(m,e+25)
		t.write("Enterprise", font=("Arial", 16, "normal"))
	m = m + 1 
      

# only close the window when it is clicked
wn.exitonclick()