So happy to share this, so here it is! MOTION BLUR IN SCRATCH! Here I used the FNAF 1 office as an exemple, but obviously you can use any sprite you want. You can absolutely use the code without crediting me, but if you do then thank you really much!
I took the base blur as a solid base, then changed it to be smaller and easier to use. If you wanna credit me, go for it! But I won't mind if you don't.