**Example 44. **Cycles with negative slope in a 3→7→12 configuration space

Y is T4(X), Z is T4(Y), X is T4(Z)

X# is T1(X), Y# is T1(Y), Z# is T1(Z)

Y is T3(X#), Z is T3(Y#), X is T3(Z#)

Note that in all drawings of configuration spaces, including this one where alignment is crucial, it is the bottom-left edge of each region that is aligned with integer offsets. This means that each region has a bottom-left corner in gray, and is bordered along its top and right in white.