Y5 LF: Use and create procedures in LOGO

A procedure is way of making a new command word in LOGO to do a specific task.

It’s a bit like a recipe for making a new meal.

In Year 4, we made a procedure to draw a letter c:

TO c

fd 20 rt 90 fd 20 bk 20 lt 90 bk 20 rt 90 fd 30 lt 90

END

Then we could just type c in our code when we wanted to draw a c.

Your task

1. Open this file and look through the code: Computing letters
2. Delete c o m p u t i n g
3. Code some other words using the letters of computing
4. Delete your word code (but keep all of the procedures)
5. Create your own letter procedure
   1. Decide on another letter, for example A
   2. Create the code to draw it
      1. make it the same size as the other letters
      2. include a “finger space” at the end of the letter
      3. make sure the arrow is facing up at the end
   3. When you are happy with your letter, put TO A (or whatever letter you did) and END around your letter code to make it into a procedure.
   4. Code a new word using the letters of computing and your letter
   5. ** Write a procedure for a second letter
   6. ** What’s the longest word you can code?
   7. *** Can you make your word into an arch?
      1. Before your first letter do   lt 30
      2. Between each letter turn right a bit
      3. Adjust the turns to get an even arch