P3
# "P3" means this is a RGB color image in ASCII
5 6
255
# "255" is the maximum value for each color
# end of header, data below
255 255 255    255 255 255    255 0 0      255 255 255    255 255 255
255 255 255    255 0 0        255 0 0      255 0 0        255 255 255
255 0 0        255 0 0        255 0 0      255 0 0        255 0 0
0 0 255        0 0 255        0 0 255      0 0 255        0 0 255
0 0 255        255 255 255    0 0 255      255 255 255    0 0 255
0 0 255        255 255 255    0 0 255      0 0 255        0 0 255