Code Along: Fun with Escape Codes

ducks.py

import random
import time

def clear_screen():
    goto_position(1, 1)
    print('\033[J', end='')

def goto_position(x, y):
    print(f'\033[{y};{x}H', end='')

def put(x, y, c):
    goto_position(x, y)
    print(c)

def waggle(duck, snack):
    if duck[0] < snack[0]:
        duck[0] += 1
    elif duck[0] > snack[0]:
        duck[0] -= 1
    elif duck[1] < snack[1]:
        duck[1] += 1
    else:
        duck[1] -= 1

def random_position():
    return [random.randint(1, 78), random.randint(1,24)]

def random_snack():
    return random.choice(['🌭', '🍔', '🍕'])

def hide_cursor():
    print('\033[?25l', end='')

def show_cursor():
    print('\033[?25h', end='')

def loop():
    hide_cursor()
    ducks = [random_position()]
    snack = random_position()
    snack_type = random_snack()
    while True:
        clear_screen()
        put(snack[0], snack[1], snack_type) 
        next_ducks = []
        for duck in ducks:
            put(duck[0], duck[1], '🦆')
            waggle(duck, snack) 
            if duck == snack:
                snack = random_position()
                snack_type = random_snack()
                next_ducks.append(random_position())
                if len(ducks) < 5:
                    next_ducks.append(duck)        
            else:
                next_ducks.append(duck)        
        ducks = next_ducks
        time.sleep(0.10)

try:
    loop()
except:
    clear_screen()
    show_cursor()