Simply draw with your mouse. Gave this idea of drawing roads, which can connect to each-other, for simulated cars to drive on a fun little test, but was met with a road-block coming from Scratch's inefficient lists. Decided to abandon this project due to that. In this example you cannot connect roads to existing roads, you can only extend outwards with new branches, as a different approach would require more way more list iterations. As such I deemed that feature pointless to implement, as the code is already struggling as is. Nevertheless I had a lot of fun with it :)