Go to Assignment part 2 for this lab, after finishing this part:

1. Draw a spiral of squares shapes: press 's'

   Steps to build this program:

2. Create a variable:

   

   Type in a name for this variable, use "sidelength":

   

   Drag out a "set sidelength" block

   

3. We're writing a program to draw these variable length squares:

   

4. Create a broadcast message inside a repeat block. Name the message "drawSquare":

   

   

   

   

5. Create blocks to receive this broadcast message to draw a square:

   

   

6. Use the variable "sideLength" in the drawSquare program block:

   

7. In the broadcasting block, you want to change the sidelength by 5 each time you draw the square. This is a variable:

   

8. Activate this script of blocks when an 's' is pressed on the keyboard:

   

   Notice how the variable of the variable "sidelength" has changed. Why?

   

9. Create blocks to clear the screen. Send a broadcast message "clearScreen":

   

   

   

10. Here's the entire program of blocks:

    

11. Go To Assignment for this lab.