How to debug an algorithm

We are learning to be debuggers. First we had to know where it was not. Then we had to remove the bbug and fix the problem. Then I had to change the algorithm to make it right. We also had to create our own algorithm for a friend to fix and change. Debugging is when you change your code so that it runs smoothly. After that we had a go at using lightbot. Do you know what that is? Have a go here. Here is our presentation that we had to correct.