Cut out each poem with a pair of scissors and glue parts 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 together in a vertical column. Glue parts -10, -9, -8, -7, -6, -5, -4, -3, -2, -1 together in a separate column. Now glue parts 10 to -10 in the middle so they make a mirror image facing each other. You should now have a collection of poems that look something like a DNA strand. If you now fold part -1 to meet part 1, the two vertical columns will again become a mirror image and the collection of poems will have transformed into a double helix.