Haematite. Rather proud of this:
p,10,11;p,10,6;b,3,11;b,4,6;m,7,10,90,1,ucdrrollwwww;m,13,10,90,1,ucdllorrwwww;m,7,11,90,1,wwwcluodrwww;m,13,11,90,1,wwwcrwowlwww;m,7,6,90,1,wwwwwwcluord;m,13,6,90,1,wwwwwwcrwolw;m,6,11,180,1,rrwwuucddllo;m,1,11,0,1,rwwwwwwwwclo;m,8,6,180,1,uodrrwwwwcll;m,0,11,0,2,l11owwwwwwrc;m,0,6,90,1,wwwcwluodrww;m,4,2,90,3,wwwwwwwcl1or;