raspberrypilearning · MarcScott · Apr 2, 2024 · May 31, 2022 · Jun 15, 2022 · Jun 17, 2022
diff --git a/en/code/secret-messages-starter/project_config.yml b/en/code/secret-messages-starter/project_config.yml
@@ -1,3 +1,3 @@
 name: 'Secret Messages Starter'
 identifier: 'secret-messages-starter'
-type: 'python'
+type: 'python'
diff --git a/en/images/messages-alphabet-array.png b/en/images/messages-alphabet-array.png
diff --git a/en/images/messages-alphabet.png b/en/images/messages-alphabet.png
diff --git a/en/images/messages-array.png b/en/images/messages-array.png
diff --git a/en/images/messages-best-friends.png b/en/images/messages-best-friends.png
diff --git a/en/images/messages-character-finished.png b/en/images/messages-character-finished.png
diff --git a/en/images/messages-character.png b/en/images/messages-character.png
diff --git a/en/images/messages-else-test.png b/en/images/messages-else-test.png
diff --git a/en/images/messages-else.png b/en/images/messages-else.png
diff --git a/en/images/messages-enc-test.png b/en/images/messages-enc-test.png
diff --git a/en/images/messages-extra-characters.png b/en/images/messages-extra-characters.png
diff --git a/en/images/messages-finished.png b/en/images/messages-finished.png
diff --git a/en/images/messages-friends-code.png b/en/images/messages-friends-code.png
diff --git a/en/images/messages-friends.png b/en/images/messages-friends.png
diff --git a/en/images/messages-if-test.png b/en/images/messages-if-test.png
diff --git a/en/images/messages-if.png b/en/images/messages-if.png
diff --git a/en/images/messages-key.png b/en/images/messages-key.png
diff --git a/en/images/messages-loop-test.png b/en/images/messages-loop-test.png
diff --git a/en/images/messages-loop.png b/en/images/messages-loop.png
diff --git a/en/images/messages-message.png b/en/images/messages-message.png
diff --git a/en/images/messages-modulus-bug.png b/en/images/messages-modulus-bug.png
diff --git a/en/images/messages-modulus.png b/en/images/messages-modulus.png
diff --git a/en/images/messages-newcharacter.png b/en/images/messages-newcharacter.png
diff --git a/en/images/messages-newmessage.png b/en/images/messages-newmessage.png
diff --git a/en/images/messages-newposition-print.png b/en/images/messages-newposition-print.png
diff --git a/en/images/messages-newposition-test.png b/en/images/messages-newposition-test.png
diff --git a/en/images/messages-newposition.png b/en/images/messages-newposition.png
diff --git a/en/images/messages-position-test.png b/en/images/messages-position-test.png
diff --git a/en/images/messages-position.png b/en/images/messages-position.png
diff --git a/en/images/messages-print-message-characters.png b/en/images/messages-print-message-characters.png
diff --git a/en/images/messages-print-message-comment.png b/en/images/messages-print-message-comment.png
diff --git a/en/images/messges-message-add-character.png b/en/images/messges-message-add-character.png
diff --git a/en/meta.yml b/en/meta.yml
@@ -29,4 +29,3 @@ steps:
   completion:
   - internal
 - title: 'Challenge: Encrypting and decrypting messages'
-- title: 'Challenge: Friendship calculator'
diff --git a/en/step_1.md b/en/step_1.md
@@ -2,11 +2,7 @@
 
 In this project, you'll learn how to make your own encryption program, to send and receive secret messages with a friend. This project ties in with the "Earth to Principia" activity on page 16 of the Space Diary.
 
-<div class="trinket">
-  <iframe src="https://trinket.io/embed/python/402256078c?outputOnly=true&start=result" width="600" height="500" frameborder="0" marginwidth="0" marginheight="0" allowfullscreen>
-  </iframe>
-  <img src="images/messages-finished.png">
-</div>
+<iframe src="https://editor.raspberrypi.org/en/embed/viewer/secret-messages-complete" width="600" height="400" frameborder="0" marginwidth="0" marginheight="0" allowfullscreen> </iframe>
 
 ### Additional information for club leaders
 
@@ -22,18 +18,6 @@ title: Club leader notes
 ## Introduction:
 In this project, children will learn how to make an encryption program, to send and receive secret messages with a friend. This project introduces iteration (looping) over a text string.
 
-## Online Resources
-
-__This project uses Python 3.__ We recommend using [trinket](https://trinket.io/) to write Python online. This project contains the following Trinkets:
-
-+ [New (blank) Python Trinket -- jumpto.cc/python-new](http://jumpto.cc/python-new)
-
-There is also a trinket containing the finished project:
-
-+ [‘Secret Messages’ Finished -- trinket.io/python/402256078c](https://trinket.io/python/402256078c)
-
-+ [‘Friendship Calculator’ Finished -- trinket.io/python/2e852cd687](https://trinket.io/python/2e852cd687)
-
 ## Offline Resources
 This project can be [completed offline](https://www.codeclubprojects.org/en-GB/resources/python-working-offline/) if preferred.
 
@@ -49,10 +33,6 @@ You can find the completed project in the 'Volunteer Resources' section, which c
 + The `find()` method;
 + The modulus operator (`%`).
 
-This project covers elements from the following strands of the [Raspberry Pi Digital Making Curriculum](https://rpf.io/curriculum):
-
-+ [Combine programming constructs to solve a problem.](https://www.raspberrypi.org/curriculum/programming/builder)
-
 ## Challenges
 + Use a Caesar cipher - encrypt and decrypt letters and words manually;
 + Variable keys - allowing the user to input a chosen key;
@@ -77,14 +57,11 @@ title: Project materials
 ---
 ## Project resources
 * [.zip file containing all project resources](resources/secret-messages-project-resources.zip)
-* [Online blank Python Trinket](http://jumpto.cc/python-new)
 * [Offline blank Python file](resources/new-new.py)
 
 ## Club leader resources
 * [.zip file containing all completed project resources](resources/secret-messages-volunteer-resources.zip)
-* [Online completed Trinket project](https://trinket.io/python/402256078c)
 * [secret-messages-finished/messages.py](resources/secret-messages-finished-messages.py)
-* [Online completed 'Friendship calculator' challenge](https://trinket.io/python/2e852cd687)
 * [offline complete 'Friendship calculator' challenge](resources/friendship-calculator-finished-friends.py)
 
 --- /collapse ---
diff --git a/en/step_4.md b/en/step_4.md
@@ -2,70 +2,272 @@
 
 Let's write a Python program to encrypt a single character.
 
+--- task ---
 
+Open the [Secret Messages starter project](https://editor.raspberrypi.org/en/projects/secret-messages-starter){:target="_blank"}.
 
-+ Open the blank Python template Trinket: <a href="http://jumpto.cc/python-new" target="_blank">jumpto.cc/python-new</a>.
+--- /task ---
 
-+ Instead of drawing the alphabet in a circle, let's write it out as an `alphabet` variable.
+--- task ---
 
-	![screenshot](images/messages-alphabet.png)
+Instead of drawing the alphabet in a circle, let's write it out as an `alphabet` variable.
 
-+ Each letter of the alphabet has a position, starting at position 0. So the letter 'a' is at position 0 of the alphabet, and 'c' is at position 2.
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 1
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+--- /code ---
 
-	![screenshot](images/messages-array.png)
+--- /task ---
 
-+ You can get a letter from your `alphabet` variable by writing the position in square brackets.
+Each letter of the alphabet has a position, starting at position 0. So the letter 'a' is at position 0 of the alphabet, and 'c' is at position 2.
 
-	![screenshot](images/messages-alphabet-array.png)
+--- task ---
 
-	You can delete the `print` statements once you've tried this out.
+You can get a letter from your `alphabet` variable by writing the position in square brackets.
 
-+ Next, you'll need to store the secret `key` in a variable.
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 2-4
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+print(alphabet[0])
+print(alphabet[6])
+print(alphabet[19])
+--- /code ---
 
-	![screenshot](images/messages-key.png)
+You can delete the `print` statements once you've tried this out.
 
-+ Next, ask the user for a single letter (called a `character`) to encrypt.
+--- /task ---
 
-	![screenshot](images/messages-character.png)
+--- task ---
 
-+ Find the `position` of the `character`.
+Next, you'll need to store the secret `key` in a variable.
 
-	![screenshot](images/messages-position.png)
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 2
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
+--- /code ---
 
-+ You can test the stored `position` by printing it. For example, that character 'e' is at position 4 in the alphabet.
+--- /task ---
 
-	![screenshot](images/messages-position-test.png)
+--- task ---
 
-+ To encrypt the `character`, you should add the `key` to the `position`. This is then stored in a `newPosition` variable.
+Next, ask the user for a single letter (called a `character`) to encrypt.
 
-	![screenshot](images/messages-newposition.png)
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 4
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
 
-+ Add code to print the new character position. 
+character = input('Please enter a character: ')
+--- /code ---
 
-	![screenshot](images/messages-newposition-print.png)
+--- /task ---
 
-+ Test out your new code. As your `key` is 3, it should add 3 to the `position` and store it in your `newPosition` variable.
+--- task ---
 
-	For example, letter 'e' is at position 4. To encrypt, you add the `key` (3), giving 7.
+Find the `position` of the `character`.
 
-	![screenshot](images/messages-newposition-test.png)
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 6
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
 
-+ What happens when you try and encrypt the letter 'y'?
+character = input('Please enter a character: ')
 
-	![screenshot](images/messages-modulus-bug.png)
+position = alphabet.find(character)
+--- /code ---
 
-	Notice how the `newPosition` is 27, and there aren't 27 letters in the alphabet!
+--- /task ---
 
-+ You can use a `%` to tell the new position to go back to position 0 once it gets to position 26.
+--- task ---
 
-	![screenshot](images/messages-modulus.png)
+You can test the stored `position` by printing it. For example, that character 'e' is at position 4 in the alphabet.
 
-+ Finally, you want to print the letter at the new position.
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 7
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
 
-	For example, adding the key to the letter 'e' gives 7, and the letter at position 7 of the alphabet is 'h'.
+character = input('Please enter a character: ')
+
+position = alphabet.find(character)
+print(position)
+--- /code ---
+
+--- /task ---
+
+--- task ---
+
+To encrypt the `character`, you should add the `key` to the `position`. This is then stored in a `new_position` variable.
+
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 9-10
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
+
+character = input('Please enter a character: ')
+
+position = alphabet.find(character)
+print(position)
+
+new_position = position + key
+print(new_position)
+--- /code ---
+
+--- /task ---
+
+--- task ---
+
++est out your new code. As your `key` is 3, it should add 3 to the `position` and store it in your `new_position` variable.
+
+For example, letter 'e' is at position 4. To encrypt, you add the `key` (3), giving 7.
+
+```
+Please enter a character: e
+4
+7
+```
+
+--- /task ---
+
+--- task ---
+
+What happens when you try and encrypt the letter 'y'?
+
+```
+Please enter a character: y
+24
+27
+```
+
+Notice how the `new_position` is 27, and there aren't 27 letters in the alphabet!
+
+--- /task ---
+
+--- task ---
+
+You can use a `%` to tell the new position to go back to position 0 once it gets to position 26.
+
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 9
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
+
+character = input('Please enter a character: ')
+
+position = alphabet.find(character)
+print(position)
+
+new_position = (position + key) % 26
+print(new_position)
+--- /code ---
+
+--- /task ---
+
+--- task ---
+
+Finally, you want to print the letter at the new position.
+
+For example, adding the key to the letter 'e' gives 7, and the letter at position 7 of the alphabet is 'h'.
+
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 12-13
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
+
+character = input('Please enter a character: ')
+
+position = alphabet.find(character)
+print(position)
+
+new_position = (position + key) % 26
+print(new_position)
+
+new_character = alphabet[new_position]
+print(new_character)
+--- /code ---
+
+--- /task ---
+
+--- task ---
+
+Try out your code. You can also remove some of your print statements, just printing the new character at the end.
+
+--- code ---
+---
+language: python
+filename: main.py
+line_numbers: true
+line_number_start: 1
+line_highlights: 11
+---
+alphabet = 'abcdefghijklmnopqrstuvwxyz'
+key = 3
+
+character = input('Please enter a character: ')
+
+position = alphabet.find(character)
+
+new_position = (position + key) % 26
+
+new_character = alphabet[new_position]
+print('The new character is: ', new_character)
+--- /code ---
+--- /task ---
 
-	![screenshot](images/messages-newcharacter.png)
 
-+ Try out your code. You can also remove some of your print statements, just printing the new character at the end.
 
-	![screenshot](images/messages-enc-test.png)