Magnify Glass

I played this game twice and it got stuck at the same places as much as I tried to move it, it just stopped . Right where the book is up on the desk near all the beakers and you have to use the magnify glass to get the code for the door. Anyone else had this problem that maybe they can help me with it please, thanks

You just need to use the magnifying glass to go over all over the page til a red circle pop up at the right code. It ll be at the lower right corner.