Module 2 Lesson 3 Over and Over Again Scratch Module 2 Lesson 3 Over and Over Again

Intro. Learning Objectives Students will become familiar with nested loops. Students will then apply these skills in creating different shapes and patterns.

Iteration = ? Iteration = repeating Today you will put a loop inside another loop. (Nested loop.)

What does the following do? Enter it into Scratch and use the Debugger to step through it to see what it does. Nested loops Trace how they run. Modify the program to.. Change the colors of the shapes in the loop Change the number of Pentagons in the outer loop to 3.

Write the program to create this screen with one set of commands?

Hints Hide the sprite and clear the screen Must have an outer loop to repeat the drawing of each shape 5 times Sides/angles: 360/sides = angle Set the x and y position before you begin drawing your first triangle. Remember to use the pen up command before moving to draw the next figure Once you have drawn the first four shapes, you will need to move the x coordinate back to the right.

Turn it in YournameMod2Lesson3Shapes

Exercise 2: Create the following with one set of commands

Hints Start by drawing one of the small squares. Modify this to make the first 4 squares. (Rotate about a corner and repeat) Pen up and move Repeat the other four squares. Use the nested loop. Extensions: Have the second group be a set of 9 smaller squares. Make 5 sets of 4 squares Save it as YourNameMod2Lesson3Squares

Activity 3 Use nested loops to draw the flower. Hints Start at (0, 0) Save it as YourNameMod2Lesson3Flower Extensions Add a stem Change the number of petals Make the petals fatter/thinner Make a bouquet of flowers