Perfect stamp-based healthbars. Use the included block to make as many health bars as needed. You can set the Maxhealth to whatever you want it to be. Note the 1 green spot on 1 health and 1 red on (MaxHealth - 1), so it never appears full if one point is lost or empty with even only one point remaining. Please use it in your games, and leave a link to your project here.
Thanks to legomany3448 for suggesting this method. If you can't use stamping, you can use the old version: http://scratch.mit.edu/projects/10084700/ If you need horizontal resizing, use this one: https://scratch.mit.edu/projects/135427463/ See it in action! https://scratch.mit.edu/projects/103493825/