Reading code game

Years ago I played a game hosted on a website where you move a dot based on pseudocode written on the side. It starts off easy, just moving the dot left, right, up, or down, but eventually you need to take in what color space your dot moved onto for if statements and while loops. It ends by introducing functions and the like to make it very complex. I think there was about 30 levels to play through. Recently a friend asked me about learning programming an