- boolean oben_frei = FALSE, unten_frei = FALSE;
- boolean links_frei = FALSE, rechts_frei = FALSE;
- boolean oben_massiv = FALSE, unten_massiv = FALSE;
- boolean links_massiv = FALSE, rechts_massiv = FALSE;
- boolean new_wall = FALSE;
+ boolean free_top = FALSE;
+ boolean free_bottom = FALSE;
+ boolean free_left = FALSE;
+ boolean free_right = FALSE;
+ boolean stop_top = FALSE;
+ boolean stop_bottom = FALSE;
+ boolean stop_left = FALSE;
+ boolean stop_right = FALSE;
+ boolean new_wall = FALSE;