1. Digital Art in Scratch part 1 Barb Ericson Georgia Tech May 2011

2. Goals Learn about –Drawing sprites –Using the pen blocks: stamp –Event handling –Loops

3. Project Description We will draw a simple shape (a plus sign) and use it to make art. –By stamping the shape as we follow the mouse –We will change the costume (color) we draw with when the user presses the space key

4. Big Picture Delete cat sprite Paint the background for the stage Paint the sprite that you will draw with –the plus sign Copy the costume for the sprite and change the color Program the sprite –To follow the mouse and leave a copy –To change costume when the space key is pressed

5. Delete cat sprite To delete the cat –Click the scissors –Click the cat Or right click on the cat and select delete

6. Painting the background Click on the stage icon in the sprites area Select the backgrounds tab –Click Edit

7. Setting background color Select a color –Using the eye dropper tool Select the fill tool –Bucket Fill the stage with the color

8. Painting the Sprite Click on star with paintbrush –To paint a sprite Select a color –Use the eye dropper Paint the sprite –Use the line tool

9. Copy the costume Click on the costume tab –For Sprite1 Click on Copy –To copy the costume Click on Edit

10. Change the Color Pick a color –Use the eye dropper Change the color –Use the fill tool You may want to grow the sprite first to make it easier to fill it Then shrink it after

11. Programming Steps When the green flag is clicked do all set-up –Clear the drawing area –Maybe set the starting costume –Then Loop forever Move to the current cursor location Stamp the shape –Draw a copy of it

12. Set-up When the green flag is clicked –Clear the drawing area

13. Follow mouse and stamp Forever - Control –Go to the cursor's x and y location - Motion Drag out mouse x and mouse y -Sensing –Stamp a copy of the sprite - Pen

14. Change Costume When the space key is pressed- Control –Switch to next costume - Looks

15. Challenges When the green flag is clicked –Set the starting position and costume Add other costumes with other colors Add a way to clear the drawing –Press a key or add a button sprite Try drawing with other shapes Add a turn

16. Concept Summary Backgrounds –Can be painted Sprites –Can be painted and copied and then edited Forever loops –repeat all the commands inside of them one at a time until the script is stopped or all scripts are stopped Events –Respond to something like the green flag being clicked or the space key being pressed