Blimpter is a drawing machine that sits underneath a small indoor helium blimp. It drops ink below its flight path, making an image on the ground as it floats. The system uses four infrared LEDs fixed on the ground to estimate its position relative to the printing area below it. A small amount of ink is dropped from the gondola of the blimp when the current guessed position corresponds to a pixel of the image being drawn. Accuracy is not important; the resulting image will be distorted as errors accumulate during the flight of the blimp.