press the green flag twice, and drag to make a line. Start the line in the center of the circle, and when you have made your line, set pause/play to 1. Press space to reset the circle. Dont make the turns too sharp, and dont set the speed or turn speed too fast or it will break. Also, overlapping lines or bringing them too close to eachother will most likely break it. The circle is called Enemy because i used a similar script in a tower defense game im working on
coding all by me, if you want to use then give credit to me for the script.