How do I get past the quicksand

Hint 1 of 4:

The next 3 lines shows where to step   . = rock not to step on

Hint 2 of 4:

|    .    .    .    5    6    7    .

Hint 3 of 4:

|      .    3    4    .    8    .

Hint 4 of 4:

|     1    2    .    .     9    10 -> just walk off from #10