fill those gaps and the second thing you want to write a lot of little programs to test to play around with that technology for this the best tool that I know it's a rebel rebel stands for read eval print loop and it's just basically a fancy way of saying that you have like a common line interface inside your application starts off trying to explain it let's see it in action if it works this time so have already start an application with a rebel inside and what I'm going to do it from my IDE I'm going to connect to that rebel so let's say