The Cat on the bed post follows the movement of the little Mouse. A short two-block script has a random timer that tells the cat to pounce on the mouse unexpectedly. The mouse has a forever loop running all the time that makes it squeak when the cat touches it (simulating that it is caught).
Based on 'Mouse in the Bedroom' at https://scratch.mit.edu/projects/433564571 Se also 'Bedroom Objects' at https://scratch.mit.edu/projects/511761004