A squiggle with some breaks in it.

In Zelazny canon, the Pattern reflects out in Shadow, just like most everything else. The nearest reflections are most complete, and thus the safest. The next 3 are usable, but quite flawed. The next 3 are usable but very dangerous. Beyond that, they're more or less unusable.

Walking a Broken Pattern gives you some GreatCosmicPowers, but nearly so much as walking the real thing.