I’ve submitted a pull request at https://github.com/2hdlockness/MMM-IronManGIF/pull/2
This pull request adds two config settings, rotate and updateInterval. The rotate config parameter is a boolean that controls whether the module should rotate through the gif images. The updateInterval config parameter is an integer that specifies the duration of display of the current image in milliseconds. Defaults for these new config parameters are false and 300000 (5 minutes) respectively.
This is accomplished by adding a scheduling function that sets the update interval using setInterval()
Let me know if you would like further clarification on the implementation or if I need to modify the pull request in any way.