I've been trying to copy what nuova suggested...I hope this comes out ok (if it doesn't try Arial or Courier New fonts).
------------'------------
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----------'---'----------
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--------'-------'--------
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-'----'-----------'----'-
Number each tulip 1 to 10 starting at the top and going from left to right. Now join:
' 1-2-5-8,
' 1-3-6-9,
' 3-4-5-7,
' 2-4-6-10,
' 7-8-9-10.