Finally got to spent some time to work on my module tonight, while sitting watching the Grammys (we are a bit slow in Australia with these things). Started adding parameters to make everything more configurable, and adding tests to make sure I am actually doing what I mean to. Looking good so far, but I think I need to investigate Test::GD that someone mentioned a while ago. And to top it off, U2 won a couple of awards, so I was quite happy.
I have got to a point with the graphs my module is producing that I am hitting problems with GD::Graph. I want my graphs to have ticks on the x-axis at varying intervals, like for the varying amount of days between the first day of a month. However, GD::Graph only give evenly spaced ticks. I think I might release a first version of the module before tackling the problem, and then maybe look at adding the functionality to GD::Graph if possible, otherwise add it to a future version of my module.