It's time to enter the Grid. Figure out a way to pop an alert() to get your flag.
Accessing the page, we are greeted with with a "console" that basicly prints what we typed in. First thing I tried was obviously `<script>alert(1)</script>` but that did not execute the script as the HTML is only inserted into the page as text, not appended as a node (create HTML node, append in document).
Then I clicked on that picture object and we get an alert! Then the flag is shown on the page.