Scholarship: Poster-making bot

I recently graduated from high school. One of the opportunities that I had in high school was to serve on student council. On council, we were required to create posters out of sheets of butcher paper to advertise school events. I have always had poor handwriting; and the large characters we were required to write seemed to amplify the imperfections of my writing. It was difficult for me to create clean, neat-looking posters. For this reason I'm proposing a robot that could write manipulate the marker for me; writing the words on the paper for me. Butcher paper is large, smooth paper which is 3 ft wide. This paper can be torn at any length, depending on the length of the string of characters Once oriented on the paper, the robot could write out a string of characters with a marker which it could place and remove from the paper. The pattern for each character could be pre-programmed into the robot. This way the robot would only need to process the sequence of the characters, and then carry out the drawing. The marker could have a home-position of being away from the paper and in some sort of cover to prevent it from drying. The robot would simply drive around the paper in the pattern of the characters, lowering the marker at the appropriate times. The virtual wall could be used to ensure that the letters remained parallel to a user defined line. To lesson driving time, a device might be mounted on the front of the robot which could move the marker from side to side as it drove forward; much like a computer printer. I believe I could integrate a standard computer keyboard onto the robot. The user would only need to type what he wanted to appear and hit enter. If the system became advanced enough, perhaps it could decode Black & White bitmaps into instructions for the robot. I imagine a robot-drawn "Mona Lisa" or an "Instructables" Logo. I'm quite certain that, if I'm awarded a kit, I'll be able to assemble a working model of this bot. I've got most of what I would need and I'm willing to locate or purchase the few tidbits that I don't already have at my disposal. Please respond with any questions, Wyatt Felt