need help making a web scenario

[spnshguy]

i can't seem to be able to make a proper web scenario. What I am trying to do is that on the web scenario, it goes to the homepage for a specific site and check if there is a required string. I am constantly getting emails saying that my site is down when it isn't. Basically, what I need is that if my web scenario does not receive 5 response code 200 in a row and that the required string is not found, then trigger my alert.

Thanks in advance for the help!