# Scratch Challenges
###### tags: `code club`

## Related Documents

[Scratch Project Cards](/XLoN8CaXSjWO50PouaEy0g?both)
[Code Club Worksheets](/@dethe/r1SGh8SnG?both)
[Code Club - Worksheet Goals](/To_SsIyNQ8ioKTPhbHCymQ?both)
[Code Club Code Tour](/hrZyAXexQT2LvZVb4UG49Q?both)
[Hosting Code Clubs](/GoJ-ekBSSbaTmzjlLQKmcg?both)

## Coding Fundamentals

There are four things every programming language needs, and virtually all of them have these in some form or other. How can you do them in Scratch?

* `Save` a value in a variable
* `Choose` whether to run some code, or which code to run
* `Repeat` some code multiple times
* `Reuse` code by putting it in a block

In order to be truly *useful* a programming language also has to be able to take input from the outside (ask the user a question, read a file) and return output from it's processing (save a file, render an image). What kinds of input and output does Scratch have? What kinds are missing, and why?

## Scratch Challenges - Game Basics

* [ ] Build an repeat forever moving a ball sprite around the screen, bouncing off walls.
* [ ] Initialize ball in a random direction on green flag clicked
* [ ] Create paddles. When ball hits paddle its direction = 0 - direction
* [ ] Move left paddle up and down with w and s keys using if blocks in a repeat forever. Do the same with right paddle, but use up and down arrow keys.
* [ ] Add a re-serve key (r) to serve the ball again without restarting, in case ball is bouncing between floor and ceiling.
* [ ] Add Score variables for each player, initialize them to zero when green flag clicked.
* [ ]

## Scratch Challenges - Drawing

* [ ] Install the pen extension
* [ ] Hide the sprite
* [ ] Draw a triangle 60 steps per side
* [ ] Draw a square 60 steps per side
* [ ] Draw a hexagon 60 steps per side
* [ ] Create a function to draw a polygon with n sides and x steps per side

## Scratch Challenges - Storytelling

* [ ] Add two sprites and set them facing each other
* [ ] Add a background setting and figure out what they are talking about
* [ ] Write a short conversation with them using `say [something] for [2] seconds` and `wait [x] seconds` blocks.
* [ ] Add something happening in the background: a bird flying a balloon floating past, people walking.
* [ ] Add a scene change, one of the characters from first scene is now talking to a new character. Maybe the second character walks up to join the conversation?
* [ ] Can you use custom blocks to simplify the overall flow of conversation?
* [ ] Can you use broadcast messages to help synchronize different things going on in the story?

## Scratch Challenges - Music

* [ ] Add the Music Extension that lets us program notes and rests
* [ ] Add some instrument sprites
* [ ] Give each instrument a person sprite to play it.
* [ ] Give each instrument a `When this sprite clicked` event block, and a `Set instrument to [instrument]` block to set it to the correct type of instrument (i.e., the guitar should sound like a guitar, etc.)
* [ ] Add notes for a song
* [ ] Camptown races: `F# F# E F# B A B F# E C# E C#`


## Scratch Challenges - BBC micro:bit

## Scratch Challenges - Lego WeDo

## Scratch Challenges - Arena Game

## Scratch Challenges - Spacewar Game

## Scratch Challenges -