task: Дойди до стены и закрась все клетки на пути — и первую, и последнюю. Стена каждый раз на новом месте.

+---+---+---+---+---+---+---+---+---+---+
|                       |               |
+   +   +   +   +   +   +   +   +   +   +
|>.   .   .   .   .   . |               |
+   +   +   +   +   +   +   +   +   +   +
|                       |               |
+---+---+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+---+---+
|           |                           |
+   +   +   +   +   +   +   +   +   +   +
|>.   .   . |                           |
+   +   +   +   +   +   +   +   +   +   +
|           |                           |
+---+---+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+
|                               |
+   +   +   +   +   +   +   +   +
|>.   .   .   .   .   .   .   . |
+   +   +   +   +   +   +   +   +
|                               |
+---+---+---+---+---+---+---+---+

+---+---+---+---+---+---+---+---+---+---+---+---+
|                                       |       |
+   +   +   +   +   +   +   +   +   +   +   +   +
|>.   .   .   .   .   .   .   .   .   . |       |
+   +   +   +   +   +   +   +   +   +   +   +   +
|                                       |       |
+---+---+---+---+---+---+---+---+---+---+---+---+
