> For the complete documentation index, see [llms.txt](https://digitalgarden.batamladen.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://digitalgarden.batamladen.com/notes/programming/python/examples-projects/cross-the-road.md).

# Cross The Road

{% tabs %}
{% tab title="main.py" %}

```python
import time
import turtle
from turtle import Turtle
from player import Player
from car_manager import CarManager
from scoreboard import Scoreboard

screen = turtle.Screen()
screen.setup(width=600, height=600)
screen.tracer(0)

player = Player()
car_manager = CarManager()
scoreboard = Scoreboard()

screen.listen()
screen.onkeypress(player.go_up, "Up")

game_is_on = True
while game_is_on:
    time.sleep(0.05)
    screen.update()

    car_manager.create_car()
    car_manager.move_cars()

    #Detect collision with car
    for car in car_manager.all_cars:
        if car.distance(player) <20:
            game_is_on = False
            scoreboard.game_over()

    #Detect successful crossing
    if player.is_at_finish_line():
        player.go_to_start()
        car_manager.level_up()
        scoreboard.increse_level()

```

{% endtab %}

{% tab title="car\_manager.py" %}

```python
from turtle import Turtle
import random

COLORS = ["red", "orange", "yellow", "blue", "purple"]
STARTING_MOVE_DISTANCE = 5
MOVE_INCREMENT = 10

class CarManager:

    def __init__(self):
        self.all_cars = []
        self.car_speed = STARTING_MOVE_DISTANCE

    def create_car(self):
        random_choice = random.randint(1, 6)
        if random_choice == 1:
            new_car = Turtle("square")
            new_car.penup()
            new_car.color(random.choice(COLORS))
            random_y = random.randint(-220, 250)
            new_car.goto(300, random_y)
            self.all_cars.append(new_car)

    def move_cars(self):
        for car in self.all_cars:
            car.backward(self.car_speed)

    def level_up(self):
        self.car_speed += MOVE_INCREMENT
```

{% endtab %}

{% tab title="player.py" %}

```python
from turtle import Turtle

STARTING_POSITION = (0, -250)
MOVE_DISTANCE = 10
FINISH_LINE_Y = 280

class Player(Turtle):

    def __init__(self):
        super().__init__()
        self.shape("turtle")
        self.color("black")
        self.penup()
        self.go_to_start()
        self.setheading(90)

    def go_up(self):
        self.forward(MOVE_DISTANCE)

    def go_to_start(self):
        self.goto(STARTING_POSITION)

    def is_at_finish_line(self):
        if self.ycor() > FINISH_LINE_Y:
            return True
        else:
            return False
```

{% endtab %}

{% tab title="scoreboard.py" %}

```python
from turtle import Turtle

FONT = ("Courier", 24, "normal")


class Scoreboard(Turtle):

    def __init__(self):
        super().__init__()
        self.level = 1
        self.hideturtle()
        self.penup()
        self.goto(-280, 250)
        self.update_scoreboard()

    def update_scoreboard(self):
        self.clear()
        self.write(f"Level:  {self.level}", align="left", font=FONT)

    def increse_level(self):
        self.level += 1
        self.update_scoreboard()

    def game_over(self):
        self.goto(0, 0)
        self.write(f"GAME OVER", align="center", font=FONT)
```

{% endtab %}
{% endtabs %}


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