This is a maze generator
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+
| | | | | | |
+ + + + +--+--+--+--+ + + + +--+--+--+--+ +--+ + +
| | | | | | | | | | |
+ +--+ + + + +--+--+--+ + + +--+--+--+ +--+--+--+--+
| | | | | | | | | |
+ + +--+--+ + +--+--+ +--+ + + + +--+--+ +--+--+ +
| | | | | | | | | | |
+ +--+ + +--+--+--+ +--+--+--+ + +--+ +--+--+--+ + +
| | | | | | | | | | |
+--+ + + + +--+--+--+ +--+--+--+ + + +--+ + +--+--+
| | | | | | | | | | | |
+ +--+ + +--+--+--+ + + + + + +--+--+--+--+ + + +
| | | | | | | | | | | | | |
+--+ + + + + + +--+--+--+ + +--+--+ + + +--+ + +
| | | | | | | | | | | |
+ +--+--+ + +--+ +--+ + +--+--+ + +--+ + +--+--+ +
| | | | | | | | | | | |
+ +--+--+--+--+--+ + + +--+ + +--+--+ + +--+ +--+--+
| | | | | | | | | | |
+--+ +--+--+ +--+--+--+--+ + + + + +--+--+ + + + +
| | | | | | | | | | | | |
+ +--+--+ + +--+--+ +--+--+ + + +--+ + +--+ + + +
| | | | | | | | | | | | |
+ + +--+--+ + +--+ + +--+--+ + + + + +--+--+--+ +
| | | | | | | | | | |
+ +--+ +--+--+ +--+--+--+--+ + + + +--+--+ +--+--+ +
| | | | | | | | | | |
+ + +--+--+--+--+ + + +--+--+ + +--+--+ + +--+ + +
| | | | | | | | | | | |
+ +--+ + +--+ + +--+--+--+--+ +--+--+ + +--+ +--+ +
| | | | | | | | | | | |
+ +--+--+ + +--+--+ + + +--+ + + + +--+ +--+ + +
| | | | | | | | | | | | |
+--+ + +--+ + + + +--+--+ +--+--+ +--+ + + +--+ +
| | | | | | | | | | | | |
+ +--+--+ + +--+ +--+ + +--+--+ + +--+--+--+ +--+ +
| | | | | | | | |
+--+--+--+ +--+ +--+--+--+--+ + +--+--+--+ + +--+ + +
| | | | | |
+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+