Press anywhere to make a splat there, or press space or the green flag for a splat in the centre. This project is designed for people who need better, customisable splats in their projects. You can change all the settings to get all sorts of fantastic splattery. Copy the render_splat block into your project to use it. To find other colours, search "colour picker" on Google and copy the "hex" value (leaving out the hastag).
Coding all by me, but I got the idea from @jake737: https://scratch.mit.edu/projects/489014209