The Cat on the bed post follows the movement of the little Mouse. It takes very little code to animate this scene. By coincidence, the cat's position is just 30 steps to the right and exactly half way up the stage. This position is described numerically as 'coordinates': x:30, y:0 (x is a reading left to right; y is a reading bottom to top).
See also 'Bedroom Objects' at https://scratch.mit.edu/projects/511761004 and 'Cat pounce on Mouse' at https://scratch.mit.edu/projects/428747943
