Click the buttons in order to see how the effect is created. It can be easily recreated for whatever sprite you like by using complentary half-transparent clones (see gtoal's project)
The strategy is by @Brontosplachna (https://scratch.mit.edu/projects/89354871/) . It is explained in the very simple gtoal's project (https://scratch.mit.edu/projects/89354871/). Excellent job guys!!! I created this project just to show how this effect is obtained.
