I am from colombia. Sorry If my english is not perfect !! I subscribed to CS50x and just completed the lecture. Now I am ready for problem set 0. The description for problem set is only "program in scratch" but it does not have an specific objective . I want to ask you all what is the program that I have to make. Does it have any specifications ? . I am little lost . Thank you sun advance for your help.

1 Answer 1


The spec says:

Now it’s time to choose your own adventure! Your mission is, quite simply, to have fun with Scratch and implement a project of your choice (be it an animation, a game, interactive art, or anything else), subject only to the following requirements.

Your project must have at least two sprites, at least one of which must resemble something other than a cat.

Your project must have at least three scripts total (i.e., not necessarily three per sprite).

Your project must use at least one condition, one loop, and one variable.

Your project must use at least one sound.

Your project should be more complex than most of those demonstrated in lecture (many of which, though instructive, were quite short) but it can be less complex than Oscartime and Pokemon Go. As such, your project should probably use a few dozen puzzle pieces overall.

Like it says, you have you make a program in Scratch (an animation, game, interactive art, etc.) that follows the requirements listed above. For examples, visit here. These should give you an idea of what to do.

If you still have issues, comment below.

  • Thank you so much for your answer . It was very clear all the requirements . My question now is I did not see all these requerientes in edx course . Where do I find it ? or there is not instructions at all? Thank you again for your answer. Commented Apr 27, 2017 at 21:04
  • When you go on edx and click to go to CS50, it'll send you to a section called Home with a video called This is CS50x 2017. If you scroll above, you should see a whole bunch of headers, like Home, Course, Discussion, Events, etc. If you click Course, it should take you to the course's outline with each week from 0 to 11. If you click Week 0, it should take you to a section with links to the lectures, notes, slides, transcripts, etc. Below those links will be a link to the problem set. Click that to go to the instructions. (continued) Commented Apr 28, 2017 at 1:01

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .