Saving progress

Assignment overview

In this assignment, you will write a toy program that allows the user to draw some dots on the screen and save their progress!

Submission instructions

Create a file called yourname-saveprogress.rkt. Implement the big-bang program described below, and save your work. Upload to Google Classroom.

The program

Write a world program that works as follows:

When the program starts up, an empty screen appears. The user can click or drag the mouse to add small dots to the screen.

There are two keyboard commands the user can invoke:

That’s it!


This assignment requires you to pull together a few things we’ve covered only briefly in class. Here are some reminders.