Questions tagged [pset0]

The "Scratch" problem set assigned at the beginning of the course.

26 questions with no upvoted or accepted answers
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3
votes
1answer
180 views

Functions returning a value?

I'm trying to implement multi-dimensional arrays in Scratch, for an implementation of maze generation. To simplify, I'd like to implement a couple of custom blocks which return a value, e.g. ...
2
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1answer
98 views

Who I can connect if my problem set 0 haven't been graded?

I have submitted 6 problem set from 0-5, but only the problem set 0 haven't been graded. Who should I contact to inform the ungraded problem set?
1
vote
1answer
100 views

Can't see images for questions in pset0 submission

I submitted problem set 0, but had problems with the images that inform the additional questions we need to answer. This meant I had to guess 3 of the 10 questions on this page. They wouldn't appear ...
0
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0answers
9 views

Can’t Save Scratch (pset0) to computer

I am unable to save my Scratch program to my computer. I am using Chrome, however, I am using it on an iPad...Has anyone had success saving to your computer on a tablet? If not, is there another way ...
0
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0answers
10 views

PSet0: How can I resolve the following errors in Scratch?

I created a bouncing ball game in scratch for CS50 PSET0. The game works well as I expected, except for the following bug/errors: The game can be paused by pressing the UP Arrow key on the ...
0
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0answers
11 views

Issues in PSet0. I can't get the sprite clones to disappear when hit by the bullets

I've been trying to debug this for 2 hours now. Basically, the alien clones won't hide or delete after being hit by a bullet. I've found some things that looked like they might work but to no avail. ...
0
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1answer
130 views

scratch submission issue

1.the "download to computer" (in file menu) of scratch does not do anything when I click on it... 2.so I just went to the file option in the safari menu bar and clicked on save as 3.then I get a box ...
0
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1answer
28 views

Trying to submit pset0 and after logging in I get redirected to a blank page

When I click the submit form link (https://forms.cs50.net/2017/x/psets/0) I get redirected to the edx page, and after logging in I get redirected to this: about:blank.
0
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1answer
78 views

pset0 - Scratch - Problem with sprite turning right

In short The sheep won't turn right. You can see the project here. (screenshot at the bottom) https://scratch.mit.edu/projects/75999804/#editor Longer Story I went slightly beyond the scope of ...
0
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1answer
14 views

Timer does not pause

in scratch my timer is not pausing when red hexagonal icon next to the flag is press. Can anyone tell me what the problem could be?
0
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1answer
18 views

How to move sprite in random positions?

Is anyone still working on problem set 0 ? I am unable to move my sprite in random positions, can anyone help me with codes ?
0
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1answer
31 views

PSet0 Switch Costume Bug? or Code error

I trying to design an game which works somewhat like a rubix cube. In my app if the A key is pressed the squares in the top row are supposed to move from right to left. So the square in the top right ...
0
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1answer
71 views

I have some questions with Scratch.(I am a beginner)

I have some questions now, I don't know how it works. please teach me these knowledge if you know it, thanks a lot. this is my first project, I have some questions. question: I want to let Tera have ...
0
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1answer
74 views

Uploading to http://cs50.edx.org/2015/psets/

hey guys trying to upload files to http://cs50.edx.org/2015/psets/0/ but cannot login .. I logged into edx with my google account and i am having problems.. any ideas ?
0
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1answer
37 views

Problems with “when color touches color”

I am currently trying to create a guessing game in Scratch that will play a soundtrack from the game Dark Souls, and you will get two choices (doors) of which boss the music is from. I want it to work ...
0
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3answers
42 views

week0-shorts-threads-example

Am getting an inverted fish after gliding towards one end. Though I used the same code. Kindly get back to me.
0
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0answers
25 views

Code Posting for all problem sets

Can I submit my code as a turbo c file or its converted notepad file ? There's some problem with the software installation at my side. Please let me know at the earliest !!
0
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1answer
68 views

http://scratch.mit.edu/ fails to open for me to upload my problem set 0 for the past 4 days

http://scratch.mit.edu/ fails to open for me to upload my problem set 0 for the past 4 days. I had been able to access it before & even registered. It fails on my smart phone & other browser ...
0
votes
1answer
39 views

Looping and calling items in a list

Say, a list containing 5 elements as 1. Apple 2. Banana 3. Cat 4. Dog 5. Elephant Now how do I call (say) each item in a "LOOP" one after another. Eg. { apple(item1) for 2 sec banana(...
0
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0answers
62 views

PSET0 problems with scratch

Trying to create a simple racing game. Couple of car sprites have identical scripts. When i wrote 1st it worked fine. But when i tried to duplicate it to another they started moving differently. And ...
0
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2answers
39 views

Where is the URL of my Scratch program?

I've "shared" the program. But when it's launched, the only URL I see is the generic scratch.mit.edu in the address bar. Where should I be looking for the URL asked for in the set 0 questionnaire? ...
0
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0answers
52 views

Touching Color Issues, Recursion and Pseudo-randoms in Scratch

http://scratch.mit.edu/projects/42012966 Hello All, So I was trying to build this little recursive scribbler that makes random little networks of lines, basically like an ant colony but have run into ...
0
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1answer
38 views

Touching event isn't going off, when sprites touch

I am pretty new to Scratch so please pardon my naive code. This is my project for problem set 0. Princess What should be happening is that when the dragon sprite touches the princess sprite, the ...
0
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0answers
75 views

Walkthrough cat/bird in Scratch

I duplicated the walkthrough where the cat chases the bird, but it does something completely different. The cat never catches the bird and keeps a set distance. Whenever the cat goes near, it suddenly ...
0
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2answers
65 views

Where can I find instructions for using the Appliance

Most everything is well; presented, however the Appliance is presented mainly during the lecture where the camera focus is on Malan; the display behind him is so out of focus that many characters ...
0
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2answers
91 views

Debugging Scratch

My code was working fine with the first two sprites introduced and then it stopped working after I made it more complicated. The goal of the game is shoot 100 balloons with the arrow by clicking on ...