Introduction - If you have any usage issues, please Google them yourself
The program of DEM
ro 0.3
bl 700 0 0 0 0 233 43.6 250 74.5 275 102.8 300 137.1 325 &
167.7 350 199.9 375 238.5 400 277.2 425 309.4 450 350 475 &
397.7 498.2 582.8 596.4 607.1 590.7 700 575