The realization space is
  [1   1   x1 - 1   0   0   1    1   x1 - 1   0          x1 - 1]
  [1   0       x1   1   0   1    0       x1   1   x1^2 - x1 + 1]
  [0   0        0   0   1   1   x1   x1 - 1   1       x1^2 - x1]
in the multivariate polynomial ring in 1 variable over ZZ
within the vanishing set of the ideal
Ideal (2*x1^6 - 8*x1^5 + 14*x1^4 - 14*x1^3 + 8*x1^2 - 2*x1)
avoiding the zero loci of the polynomials
RingElem[x1 - 2, x1^2 - x1 + 1, x1 - 1, x1, x1^2 - 2*x1 + 2, x1 + 1, 2*x1 - 1]