My Bungie Ball

Sorry guys if it's terrible. Basically what happened was I got a shitty version of paint from the mac store (I was using someone else's computer not my PC) and first it wouldn't let me post stuff bigger than a certain amount (it was the free amount) and so I was like...Okay? Then, after that it wouldn't let me properly save, and then when I finally got it, it would only insert into documents and it was greyed out when I tried to get it to submit to imager, saying something like a corrupt file. Finally I had to take a screenshot of it (making it even smaller) and then there was those grey and white mini squares in a chess pattern (that goes away once saved, but I couldn't make it go away since I was in the program itself) so I had go to go into imgur and white everything out. WHY!