Mother Nature did. The most mesmerizing feature of the Rainbow Eucalyptus is the tree bark itself: The bark of the tree splits, cracks, and peels off in large strips to reveal new bark below, which is brightly hued with various colors that start out a vibrant, eye-popping green. Then, as the new bark ages, it begins to turn blue and purple, and eventually ends up turning red, orange, and yellow.

Unlike other tree species that shed their bark once annually, the Rainbow Eucalyptus sheds its bark continuously, which is why you can see all the different colors competing for space on the trunk and limbs!

Learn more: https://steemit.com/nature/@justusagenstum/daily-fun-facts-26-the-rainbow-eucalyptus-tree

And: https://en.wikipedia.org/wiki/Eucalyptus_deglupta