Create Ruby GEM that creates a PNG image using imageMagick from input values

This ruby gem will create a PNG image from several input variables. The image process should use imagemagick. This GEM is to be integrated into an existing Ruby on rails project. Please see attachment for full requirements To help me test this project, it would help if you could install this gem on heroku etc with a front end test webpage with input fields. This is so I can test out the GEM by itself. When I enter the values into the webpage, the output image should be shown. I will be giving this GEM to the developer at a later point in time so I won’t be able to install the GEM myself for testing for this project.