Get+the+Picture?


 * This lesson will cover: **


 * The Scratch environment
 * o Sprites
 * o Code blocks
 * Fixed loops
 * The broadcast and wait command
 * Programming computer graphics

In this lesson, you will write programs to create simple computer graphics using Scratch’s **Pen** blocks.
 * Introduction**

Your teacher will show you a screen cast. This demonstrates how to use Scratch to create some simple computer graphics (pictures).
 * Task 1: Shaping up**

In a word document create the following table and update with a screen shot each time you create a shape:



Now try out your programs (either double-click on the stacks of blocks or add a when flag clicked block at the start). Did your programs work? If not, why not?

** The Rule of Turn **

Did you spot the pattern here? In every shape, we turned a **full circle** (360°). To work out how many degrees we need to make at each turn, simply…
 * Divide the total number of degrees turned in the shape by the number of turns taken**

So… in a square, we go round 360° in 4 turns, so 360/4 = 90° per turn;

in a pentagon, we go round 360° in 5 turns, so 360/5 = 72° per turn


 * Task 2: You’re a star! **

Now use the Rule of Turn above to draw a five-pointed star (opposite).
 * Hint ** : Pay ** careful ** attention to what the rule says!

Create a circle. This is easier than you might think: simply: //repeat 36 times// //move 5 steps// //turn 10 degrees//
 * Task 3: Circle**

Make a pattern out of 36 squares arranged in a circle of their own.
 * Task 4: Circular pattern**

//repeat 36 times//

//**draw a square** ............ put the code to draw a square here // //turn 10 degrees//

Try changing the shape in the middle to triangles or hexagons.



Get the Picture - Extension
 * Extension Tasks**


 * Did you understand?**