imacros script

Hello I need an imacro script ( [login to view URL] ), but i am not able de write it myself. So i pay for the one how do it for me. The script does: -> call a webpage in a loop until the page does contain a specific content. In other langage, It would looks like ################## While ( open([login to view URL]) CONTAIN "Sentence to detect" ) then sleep 0.001 end; exit; ################## The output must be a ready to use to chrome.