Open a crafting table
Place 7 sticks in the crafting grid
Arrange the sticks in a ladder shape:
Put 1 stick in the left column, top row
Put 1 stick in the right column, top row
Put 1 stick in the left column, middle row
Put 1 stick in the center row, middle slot
Put 1 stick in the right column, middle row
Put 1 stick in the left column, bottom row
Put 1 stick in the right column, bottom row
Collect 3 ladders from the result slot