Step 1

Initiation

Step 2

3 clears, 2 goes under, 1 sets up space, 4 cuts deep

Step 3

2 clears, 4 goes under, 1 cuts deep, 3 sets up space

Step 4

4 clears, 1 goes under, 3 cuts deep, 2 sets up space

Step 5

1 clears, 3 goes under, 2 cuts deep, 4 sets up space

Step 6

3 clears, 2 goes under, 4 cuts deep, 1 sets up space

Step 7

2 clears, 4 goes under, 1 cuts deep, 3 sets up space

Step 8

the end

Step 9