Jenkins simple random date number - step error

Please help me with a suggestion to get it working? Only have a couple hours, 2 hours max Need to set a random number myrandom = sh 'date %Y%m%d%H%M%S' ' Message says WorkflowScript: 72: Expect a step @ line 72, column 17. I can give you snapshots - Please help me get this working? Please note there is hope we can mutually complete this task; we can leave each other nice comments and 5 stars for each?