Divide hair into five equal strands, holding two in each hand and letting the middle strand hang loose.
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Pull strand 1 over strand 2, then under strand 3, and drop it. (The old strand 1 is now strand 3; the old strand 3 is now strand 2.)
Repeat with the other hand: pull strand 5 over strand 4 and under strand 3, and drop it. (The old strand 5 is now strand 3; the old strand 3 is now strand 4.)
Repeat with both hands until you reach the bottom. Secure with an elastic.