Algorithms - Challenge: implement insert

Hello good people,

I have some trouble with this challenge. I'm getting expected sorted array and correctly done second step but the first one is still not completed and i can't finnish this challenge. I probably didn't do challenge as it was expected but i'm not quite sure how can i do it more efficently since im just learning! 

This is the hint im getting.

var  = ?;
for(? =  ...; ... ; ...) {
    array[? + 1] = ...;
}   
...;
;

And this is how i did my code:

var insert = function(array, rightIndex, value) {
    for(var i = rightIndex + 1; array[i] <= array[i-1]; i--){
        var temp = array[i];
        array[i] = array[i-1];
        array[i-1] = temp;
    }
};

Link to this challenge is: 
https://www.khanacademy.org/computing/computer-science/algorithms/insertion-sort/pc/challenge-implement-insert

Any help would be really appreciated :) 

Thanks!