Help creating content block

Hi guys . i would like to create a content block that blocks the screen until the visitor clicks the "enter " or proceed button . something similar to the images attached

But i want mine to have a button or box that has the words "ENTER" on it an when the visitor clicks enter , the content block clears and the visitor can access the content .

 

anyone willing to help ?

 

search for content locker.

 

Thanks i was searching for content blocker all this time , Never knew it was content locker (silly me .) I've come across some . Thanks