mark second step as done

README.md

@@ -13,7 +13,7 @@
 
 - [x] Read the input bitmap and count NxN patterns.
   - [ ] (optional) Augment pattern data with rotations and reflections.
-- [ ] Create an array with the dimensions of the output (called "wave" in the source). Each element of this array represents a state of an NxN region in the output. A state of an NxN region is a superposition of NxN patterns of the input with boolean coefficients (so a state of a pixel in the output is a superposition of input colors with real coefficients). False coefficient means that the corresponding pattern is forbidden, true coefficient means that the corresponding pattern is not yet forbidden.
+- [x] Create an array with the dimensions of the output (called "wave" in the source). Each element of this array represents a state of an NxN region in the output. A state of an NxN region is a superposition of NxN patterns of the input with boolean coefficients (so a state of a pixel in the output is a superposition of input colors with real coefficients). False coefficient means that the corresponding pattern is forbidden, true coefficient means that the corresponding pattern is not yet forbidden.
 - [ ] Initialize the wave in the completely unobserved state, i.e. with all the boolean coefficients being true.
   - Repeat the following steps:
   - Observation: