DNA origami is an interdisciplinary area where DNA can be used as a building block for making useful structures at nano scale. DNA pen is an open source software based on the recent work of Peng Yin and his group [1] which can be used (using free hand and digital molecular canvas) to draw an object at nanoscale. Software generates error free DNA sequences which can be used in the wet lab to create the object at the nano scale. Using DNA pen we have drawn several objects including the map of India and sanskrit letter "Om" from free hand molecular canvas and digital letter DNA using digitized molecular canvas.