+-----------------------------+
| state |      0   |      1   | 
+-------+----------+----------|
|     0 :  1  R  1 |   Stop   | 
+-------+----------+----------|
|     1 :  1  L  2 |   Stop   | 
+-------+----------+----------|
|     2 :  0  L  2 |  0  L  3 | 
+-------+----------+----------|
|     3 :  1  R  4 |   Stop   | 
+-------+----------+----------|
|     4 :  0  R  4 |  0  R  5 | 
+-------+----------+----------|
|     5 :  1  L  2 |   Stop   | 
+-------+----------+----------|