First, allow your camera to be on. Put your head in the oval, then click space. Tilt your head, and move around. To sync it again, click the flag.
If you move to fast, it will get out of sync. The higher the sensitivity, the more slow. I just found out about these blocks... how did i not know about them earlier! Thanks to all of the face tracker projects for showing me that these blocks existed. Credits: https://scratch.mit.edu/projects/41196022/ for the pointing script, made by @MemoByte The rest is by me