After the ai is done training, press space whenever play? = yes to start the calculations.
Due to scratch being unable to save a lot of data, you will have to train the ai yourself. Luckily, you just need to wait for the ai to train itself. Make sure to run the project in turbo mode, and for decent results, train it with at least 100,000 times. Steps is also the live move counter. Note I didn't bother to add anything after 131072, so the display numbers will loop, but just use the colours to differentiate.