Click green flag to reset. Try to dodge the bullets if you want, see how many times you get hit. You can adjust the rate of spin and how fast the bullets move. Press 1-8 to adjust the number of spawners, then click green flag to reset.
Recreation of spell card Boundary Sign "Border of Wave and Particle" from Touhou 9.5 and Touhou 11. If you set the speed too low the pattern breaks as there are too many clones for Scratch to handle.