{do: [
    {ask: "Enter file name: ",
        type: "file"},
    {fetchFile: {showProgress: "progress_bar"},
        reportInterval: 1.0},
    {spawn: {withRetry: {uploadToDropbox: {user: "cat", password: "meow"}},
                maxTries: 5,
                  onfail: {do: [
                            {deleteTempFiles: null},
                            {ask: "Dropbox upload failed. Try again?",
                                type: "yes/no",
                                 yes: {retry: true},
                                  no: {raise: "Give up"}}
                            ]}}},
    {cacheInLocalStore: "prefix"},
    {showInElement: "element_id"}
]}