CS 139 Algorithm Development
PA0: Making art with Scratch

Due: Tuesday, Sep 10th at 11:59 PM

• -10% on Sep 11th
• -20% on Sep 12th
• -35% on Sep 13th
• -50% on Sep 15th
• Not accepted afterwards

Objectives

• develop greater fluency with computational concepts (i.e. sequence, loops, objects)
• practice incremental development, testing, and debugging in a self-directed project

Instructions

Now is your chance to shine! You have already introduced yourself with the "about me" exercise, created a "dance party" with multiple sprites, and learned about several programming constructs. In this assignment, you will create an original work of interactive art. Viewers should be able to participate with your artwork using the four arrow keys:

It's up to you where to handle arrow key events: in a single sprite, in multiple spites, on the stage, all of the above, or something else. Your project should also include some aspect of random behavior, for example:

Random numbers can be used in Scratch in place of any regular number (i.e., whenever there's a rounded placeholder in a block). You can even pick a random number between two random numbers!

Refer to the "Arts" handout for a list of other recommended blocks.

Minimal Requirements

1. Three or more sprites that change costumes or colors
2. Different interactions for each of the four arrow keys
3. An if-else block inside of a loop (e.g., forever or repeat)
4. Use of random numbers (but don't randomize everything)
5. Some original drawing, either with sprites or pen block.

Be Creative

You can design any project you like as long as it satisfies the above requirements. And just for fun, consider adding an Easter Egg.

Consider any or all of the following:

1. Additional key behavior.
2. Interaction with the user (game behaviors) above the listed 4 key behaviors.
3. Telling a story or performing a play.
4. Creative use of audio or photographs.

Deliverables

1. Your name, project title, and one-paragraph description of your project. If you used images, audio, or code from another source, you must acknowledge it in this file as a second paragraph.
   Please save these in a plain text file (not Word). You should include your name at the top of the file.


2. A representative screenshot of your artwork.
   Right click the stage and select "save picture of stage..."


3. Your Scratch project file itself.
   Note that Scratch embeds any images/sounds you add.

We will replace the virtual gallery of your projects for all students to enjoy. So make sure you do a professional job on all three of these deliverables! See the pictures in the lab for examples of other projects.

Honor Code