Whenever you need to force a user to complete multiple actions before they can progress you need a variable.
When the page loads set the variable to it's own value - that way if it is EMPTY or has a default value it will be populated as such. PLUS - if you return to the page and you have previously completed the required actions then the variable will reflect those previous actions.
Best bet is to set the variable ( when created ) to EMPTY - no value......
Next - when a required action is begun/completed ( i.e. a button has been clicked ) ADD a value to the variable, but add a LETTER - NOT a NUMBER. Let's say - when the button is clicked add "A" to the variable VALUE.
BUT make sure you ONLY add the "A" IF there is NO "A" already in the variable - or you'll be adding an A to the variable every time you click the button.
Add this logic to the rest of the button ( add B, C, D ) when clicked.
The check to make sure the user has completed the required actions by checking that the variable contains A,B,C & D before they can move ahead OR you then display the prompt. You could even notify the user of which actions haven't been completed based on the value of the variable itself.
