Numerical Analysis — error in first Picard iterate

Picard method is used to find approximate solution $y^{(1)}(x)$ {first iterate of Picard's approximation} of initial value problem $\frac{dy}{dx} = -2xy^2$, $y(0) = 1$. What is the value of $|y^{(1)}(x) - y(x)|$ at $x = 0\cdot 2$?