Design for a truck tarp messenger bag (LorryBag)

Hi guys, We are looking for a cool design for messenger bags, which we are giving out at our startup conference in October! Basically, everything goes. We're looking for something creative, which looks nice. We'd like to have a bag, which our participants won't only wear during the conference itself, but also afterwards. It should mainly include our lightbulb (attached), which can be stylized in any way, but also our conference's name/logo & website. As our main corporate color is green, the bag can but doesn't necessarily have to be green. A few words about us: We’re Europe's biggest conference on entrepreneurship & startups and are solely organized by students. We will welcome young founders, students, investors and keynote speakers at our university's campus. Thus, we would like to present ourselves on the one hand as a professionally organized conference, still having the charm of a young and casual atmosphere. As our freelancer we’ll be happy to invite you to our event! We might also have the opportunity for further work.