Scratch

import random

extinct = False

print "Welcome to Evonomics Alpha!  This simulation focuses on following the evolution of a species through a certain amount of years in a given environment"
norp = raw_input("Do you want to make a new species or use a preexisting one?  Input the whole word with a capital at the start.")

if norp == "Preexisting":
    choice = raw_input("Which species do you want to use?  Type 'giraffe', 'lion', 'elephant', 'tiger', 'wolf', or 'dog'.")
    name = choice
    
    if choice == "giraffe":
        heightdom = "Tall"
        heighthigh = 180
        heightlow = 156
        speed = 5
        fight = 4
        food = "Herbivore"
        repnumb = 3
        reptime = 8
        survive = 7
        temp = 5
        al = 30
    
    elif choice == "elephant":
        heightdom = "Tall"
        heighthigh = 120
        heightlow = 108
        speed = 7
        fight = 6
        food = "Herbivore"
        repnumb = 2
        reptime = 12
        survive = 8
        temp = 10
        al = 45
        
    elif choice == "lion":
        heightdom = "Tall"
        heighthigh = 55
        heightlow = 4
        speed = 35
        fight = 7
        food = "Omnivore"
        repnumb = 4
        reptime = 8
        survive = 5
        temp = 15
        al = 35
        
    elif choice == "tiger":
        heightdom = "Short"
        heighthigh = 45
        heightlow = 35
        speed = 50
        fight = 6
        food = "Omnivore"
        repnumb = 3
        reptime = 7
        survive = 6
        temp = 10
        al = 25
        
    elif choice == "wolf":
        heightdom = "Tall"
        heighthigh = 50
        heightlow = 40
        speed = 30
        fight = 6
        food = "Carnivore"
        repnumb = 4
        reptime = 12
        survive = 8
        temp = 20
        al = 15
        
    elif choice == "dog":
        heightdom = "Tall"
        heighthigh = 40
        heightlow = 25
        fight = 4
        food = "Omnivore"
        speed = 20
        repnumb = 7
        reptime = 10
        survive = 7
        temp = 15
        al = 10

elif norp == "New":
    name = raw_input("What is the race called?")
    heightdom = raw_input("Are they more likely to be tall or short?  Input the whole word with a capital at the start.")
    heightlow = input("What is the minimum height in inches?")
    heighthigh = input("What is the maximum height in inches?")
    food = raw_input("Is the animal a carnivore, herbivore, or an omnivore?  Type the whole word with a capital at the start.")
    reptime = input("How many months does it take them to reproduce?")
    repnumb = input("How many offspring do they have at a time?")
    temp = input("How many degrees of natural insulation do they have?")
    fight = input("On a scale of 1 to 10, how well do they fight?")
    speed = input("On a scale of 1 to 10, how fast are they?")
    survive = input("On a scale of 1 to 10, how well do they adapt?")
    al = input("How many years is their average lifespan?")

if heightlow > heighthigh:
    x = heightlow
    heightlow = heighthigh
    heighthigh = x

average = 0.5*(heighthigh+heightlow)
a=int(heightlow)
b=int(heighthigh)
c=int(average)
if heightdom == "Tall":
    if random.randint(0, 4) == 4:
        height = random.randint(a, c)
    else:
        height = random.randint(c, b)
elif heightdom == "Short":
    if random.randint(0, 4) == 4:
        height = random.randint(c, b)
    else:
        height = random.randint(a, c)
x = random.randint(85, 130)/100
weight = x*height
needs = 0.010203020301*weight


environment = raw_input("What environment should it be released in? Type 'desert', 'tundra', 'plains', or 'forest'.")

if environment == "desert":
    temp2 = 9
    foodh = 2
    foodc = 3
    dis = 4
    bonus = 1000000

elif environment == "tundra":
    temp2 = 10
    foodh = 1
    foodc = 2
    dis = 2
    bonus = 1000000

elif environment == "plains":
    temp2 = 65
    foodh = 6
    foodc = 6
    dis = 5
    bonus = 85

elif environment == "forest":
    temp2 = 50
    foodh = 9
    foodc = 7
    dis = 7
    bonus = 110


years = input("How many years should this be simulated?")
pop = input("How many should be released into the wild?")
monthsmore = reptime
yearsdone = 0
yearsleft = al

for i in range (0, years):
    yearsleft -= 1
    popbefore = pop
    for j in range (0, 12):
        for k in range (0, pop):
            if temp2 + temp > 100 or temp2 + temp < 15:
                if not survive + random.randint(1, 2) > 10:
                    pop -= 1
        if food == "Herbivore" and needs*pop > 25*foodh:
            pop -= random.randint(1, pop/10)
            needs -= random.randint(15, 35)/10
        else:
            if food == "Carnivore" and needs*pop > 25*foodc:
                pop -= random.randint(1, pop/10)
                needs -= random.randint(15, 35)/10
            else:
                if food == "Omnivore" and needs*pop > 25*(foodc+foodh):
                    pop -= random.randint(1, pop/10)
                    needs -= random.randint(15, 35)/10
                    
        if random.randint(0, 100) < dis+1:
            pop = random.randint(0, 1)+pop/10

        for l in range (0, pop):
            if food == "Carnivore":
                if fight > random.randint(3, 6):
                    foodc +=0.05
            elif food == "Herbivore":
                if fight < random.randint(5, 8) and speed < random.randint(4, 9):
                    pop -= 1
                    fight += 0.1
            elif food == "Omnivore":
                if fight > random.randint(3, 6):
                    foodc +=0.05
                if fight < random.randint(5, 8):
                    pop -= 1
                    fight += 0/1

        monthsmore -= 1
        if monthsmore == 0:
            for i in range (0, pop/2):
                pop += repnumb
                x = random.randint(3, 9)
                x -= 6
                x = x//1000
                height += x
                y = random.randint(2, 6)
                y -= 4
                y = y/1000
                weight += y
                if random.randint(0, 200) == 1:
                    if food == "Carnivore":
                        foodc += 0.02
                    elif food == "Herbivore":
                        foodh += 0.02
            monthsmore = reptime

        if height > bonus and food == "Herbivore":
            foodh += 5

        if weight > 75*survive:
            pop -= 5
            weight -= 10

        if weight < 20*survive:
            pop -= 5
            weight += 10

    if pop < 50:
        pop -= random.randint(0, 25)
    elif pop < 150:
        pop -= random.randint(0, 50)
    else:
        pop -= random.randint(1, pop/10)
    if yearsleft == 0:
        scaler = random.randint(95, 105)
        scaler = scaler/100
        pop -= oldpop*scaler

    if pop < 1:
        print "Your species went extinct.  They had average height ", height, "inches, weight ", weight, "pounds, and survived for ", yearsdone, " years.  Please close the IDLE and play again!"
        extinct = True
    else:
        yearsdone += 1
        print yearsdone, " years have passed so far.  This breed of ", name, " currently has a population of ", pop, " in the ", environment, "environment."
        
        if extinct:
            break
    if extinct:
        break


if not extinct:
    print "Your species went extinct.  They had average height ", height, " inches, and weight ", weight, " pounds.  Please close the IDLE and play again!"