Karelgenesis_of_Life/main.py

from karel.stanfordkarel import *
"""
Inspired by John Conways "Game of Life" and "Biogenesis" by Joan Queralt Molina.

The three phases of life start with Karel seeding a few fountains of youth, represented by beepers on black patches of "land".

Than the circle of life commences, with Karel being the fickle hand of god that moves randomly over the board,
at certain times deciding to bless or smite the life she passes.
Being blessed means growth and changing colour, while smiting leads to permanent death or being composted.
After several steps of growth it is possible for life to reproduce, and spread to other patches of land;
possible in the process overwhelming neighboring life.

After an ungodly amount of divine acts, in the final ascension phase, the fountains are collected by their creatress Karel;
leaving only the result of the onslaught of the competition that is life.

TIP: Run at top speed to spare your own life from wasting away...
"""

## Helper functions:
# Turn left trice:
def turn_right():
    for i in range(3):  
        turn_left()

# Keep moving while not blocked:
def move_till_end():
    while front_is_clear():
        move()

# 20% chance to move:
def perhaps_move():
    if random(0.2): 
        move()

def pick_if_present():
    if beepers_present():
        pick_beeper()

# Move to next row:
def next_row():
    # Turn west:
    if facing_east():
        turn_left()
        if front_is_clear():
            move()
            turn_left()
        
    # Turn east
    else:   # Facing west
        turn_right()
        if front_is_clear():
            move()
            turn_right()

def wall_check():
    if front_is_blocked():    # End of row
        next_row()

# Move to southeast corner:
def genesis_position():
    # Move south:
    while not_facing_south():
        turn_left()
    move_till_end()

    # Move west:
    while not_facing_west():
        turn_left()
    move_till_end()

    # Turn:
    while not_facing_east():
        turn_left()

# Do not face walls, and sometimes change direction:
def orient():

    # Perhaps turn
    if random(0.1): # 10% chance to turn
        if random(0.5): # 50% chance to go right or left
            turn_left()
        else:
            turn_right()
    
    # Make sure not to face an obstruction
    while front_is_blocked():
        turn_left()


## Main functions:
# According to biologists, the sole goal of life.
def reproduce():
    move()
    if no_beepers_present():    # Unseeded tile

        # Seed life
        paint_corner("black")   
        put_beeper()
    
    else:   # Seeded tile
        if random(0.5): # 50% chance
            paint_corner("orange")  # Accelerate life or overtake another life.
        else:   # Remainder 50% chance
            die()   # Compete, cancelling each other out.
    
    # Never leave Karel facign a wall:
    orient()

def die():
    # Permanent death:
    if random(0.2): # 20% chance
        paint_corner("white")
        pick_beeper()
    
    # Seed for rebirth | Composting:
    else:   # Remainder 80% chance
        paint_corner("black")

# Grow, die or reproduce:
def paint_life():
    # In reverse order, since "elif" is not available.
    #if corner_color_is("pink"):    # End condition, but "quit()" is not available
    #    quit()

    if corner_color_is("cyan"):
        if random(0.8):    # 80% chance
            paint_corner("pink")    # Evolve
            
            # Reproduce quadrice:
            for i in range(4):
                reproduce()
            
        else:   # Remainder 20% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("green"):
        if random(0.8):    # 80% chance
            paint_corner("cyan")    # Evolve

            # Reproduce thrice:
            for i in range(3):
                reproduce()
            
        else:   # Remainder 20% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("blue"):
        if random(0.8):    # 80% chance
            paint_corner("green")   # Evolve

            # Reproduce twice:
            for i in range(2):
                reproduce()
            
        else:   # Remainder 20% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("olive"):
        if random(0.6):    # 60% chance
            paint_corner("blue")    # Evolve
            reproduce()
        else:   # Remainder 40% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("orange"):
        if random(0.5):    # 50% chance
            paint_corner("olive")    # Evolve
        else:   # Remainder 50% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("red"):  # Adolescence
        if random(0.4):    # 40% chance
            paint_corner("orange")  # Evolve
        else:   # Remainder 60% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("purple"):   # Early stage
        if random(0.3):    # 30% chance
            paint_corner("red") # Evolve
        else:  # Remainder 70% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("brown"):    # Infancy
        if random(0.2):    # 20% chance
            paint_corner("purple")  # Evolve
        else:   # Remainder 80% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("gray"): # Prenatal
        if random(0.1):    # 10% chance
            paint_corner("brown")   # Evolve
        else:   # Remainder 90% chance
            if random(0.2): # 20% chance of death, else stagnation.
                die()   # Death
    if corner_color_is("black"):    # Field is seeded
        paint_corner("gray")    # Sprout life

# Prepare the world with habitable patches.
def seed():
    genesis_position()

    while front_is_clear():

        # Perhaps seed a fountain of life
        if random(0.3): # 30% chance
            paint_corner("black")
            put_beeper()
        
        move()
        wall_check()
    
    # Face away from the wall
    orient()

# The circle of life                
def life_loop():
    for i in range(9999):   # Incubation period

        # Path of god, played by karel:
        for step in range(9):  # Travel period
            perhaps_move()
            orient()
        paint_life()

# End the game neatly:
def ascension():
    genesis_position()

    # Remove seeds
    while front_is_clear():
        pick_if_present()
        move()
        pick_if_present()
        wall_check()
    
    genesis_position()


 # The three phases of life:
def main():
    seed()
    life_loop()
    ascension() # The script should not run forever, making some unintended biblical implications...


# don't change this code
if __name__ == '__main__':
    main()