A quick project testing a more or less generic and more or less accurate method to keep track of which clones are touching which other clones, including clones of different sprites. This method uses global lists of clone coordinates. Each clone checks if it touches other clones, and calculate which of those is the closest. See code inside. This was in response to this question: https://scratch.mit.edu/studios/25643089/comments/#comments-179497172 See also this example, 'Food / Feeder Clones': https://scratch.mit.edu/projects/665020766/ All code by me (@kriblo).