Step1: find something you want to sensor
step2: copy and paste it as a sprite in construct
step3: make a square over the image by clicking the square in the sprite editor/creator page and dragging it over the thing you don't want people to see
the end result would look like this please do not hit the X button I just had to click it because it won't let me take a screenshot with that open
step4: now hit the copy button which should look like this [[]
now go to google sites and press ctrl+ v on your keyboard AT THE SAME TIME
YOU ARE DONE congratulations