custom block for you to use is in the first sprite called 'custom block' this program determines if your mouse or other object(s) are close to another object(s) or your mouse the buffer variable determines how close the mouse (or object(s)) need to be to the object(s) (or your mouse) for the close? variable to be triggered (you can see this if the close? variable becomes 1 instead of 0) and then I realized the 'distance to' block existed