Question 552825
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green(line(0,0,8,0),line(0,1,8,1),line(0,2,8,2),line(0,3,8,3),line(0,4,8,4),
line(0,0,0,4),line(1,0,1,4),line(2,0,2,4),line(3,0,3,4),line(4,0,4,4),line(5,0,5,4),line(6,0,6,4),line(7,0,7,4),line(8,0,8,4)),red(line(6,0,8,0),line(8,0,8,4),line(8,4,7,4),line(7,4,7,2),line(7,2,6,2),
line(6,2,6,0), line(0,0,3,0),line(3,0,3,3),line(3,3,2,3),line(2,3,2,2),line(2,2,1,2),line(1,2,1,1),line(1,1,0,1),line(0,1,0,0) )





)}}}

Edwin</pre>