Programs are written to produce pixel grey map (pgm) according to relative temperature settings. Then in order to make an easy transition to more portable format such as gif, UNIX based converters such as pgmtoppm, ppmtogif are used.
In order to present the result that consists of different images representing a state of the system being computed (in transient 2-D heat conduction)
After we convert the images to gif files, program called ImageMagick was used to animate the gif files if necessary.