gistfile1.txt

function process_image(image_data) {
}

function get_imgur_image(params, callback) {
    $.get("imgur url", params, function(data) {
        if(data === not what you're looking for) {
            get_imgur_image(updated_params, callback);
        }
        else {
            callback(data)
        }
    });
}

get_imgur_image({...params...}, process_Image);