Snake

Step 1: Make a snake!

Don't worry about making the snake a certain length yet; just let the tail stay in the middle of the screen. Once the snake hits the edge of the screen, print "Game over."

Some turtle functions you might find useful here:

my_turtle.dot(10) # You can change the number to change the size of the dot

my_turtle.xcor() # How far left or right is your turtle?

my_turtle.ycor() # How far up or down is your turtle?

The coordinates of the screen go from -200 to 200.

Step 2: Turn left and right

There is a function called "onkey" that will run a function of your choice when a key is pressed. This is how it works:

screen = Screen() # This gives you a variable for the screen

screen.listen() # Listen for key presses

screen.onkey(my_function_name, "Right")

my_function_name is a function that you define yourself. In this case, your function would run every time you press the right arrow key.

Step 3a: Make the snake's tail follow the head

The way I solved this problem involved adding and removing things from lists. Here are some list-related functions that might be useful for this step:

my_list = ['ugh', 'my', 'snake', 'game', 'is', 'going', 'terribly']

my_list.pop(0) # Remove the first thing from the list

my_list.append("awesome") # Add “awesome” to the end of the list

length = len(my_list) # Check how many things are in the list

print(my_list)

OUTPUT: ['my', 'snake', 'game', 'is', 'going', 'terribly', 'awesome']

print(length)

OUTPUT: 7

Step 3b: Now make it not look weird

Don’t panic if your snake looks like a weird caterpillar (as in video 3a)! This just means you need to take control of when the screen updates. This is how you can do that:

screen.tracer(0, 0) # This turns off the animations – run this once at the start

screen.update() # Run this when you want to see the "current" version

time.sleep(0.1) # Use this to pause between steps if the snake is too fast

Step 4: End the game when the snake hits itself

For this step, you might need to check if a certain item is in a list. Here’s how:

secret_numbers = [5, 28, 97]

guess = 28

if guess in secret_numbers:

print(“You guessed one of my secret numbers!”)

Step 5: Add snacks!

When the snake gets the food, your score should go up, the snake should get longer, and a new food should appear somewhere at random.

To place the food randomly, you need to be able to get random numbers.

The function you need is called "randint". Google "Python randint" to see how to use it.