Javascript:: Looping thru multidimentional array of objects [duplicate]

I am looking for a proper way to extract all the array of objects thru simple loop.

let scores=
{
    ballet:
    {
        monica:     ["comments1","91"],
        yael:       ["comments2","79"],
    },
    swimming:
    {
        gabay:      ["comments3","82"],
        victor:     ["comments3","95"],
    },
    guitar:
    {
        gangina:    ["comments4","97"],
        diko:       ["comments5","42"],
    }
};

…as a side note since the real database is huge so performace is also an issue here 🙂

I was tring :

let index = 0;
while(index < scores.length){
  console.log(scores[index]);
  index += 1;
}

with no results 🙁

…and I thought it must be simple 🙂