pbm grid
2224198737 25671
2224198737 25671
2224198737 25671
pbm tiled
0 0 0
0 0 0
0 0 0
0 0 0
pgm ellipse
0 0 0
0 0 0
0 0 0
0 0 0
pgm ellipse -4depth
0 0 0
0 0 0
0 0 0