Came across this idea from Chèvrefeuille at Carpe Diem Haiku Kai. It is called ‘Fibo-ku in you have to follow the Fibonacci sequence in your haiku, as follows:
1st line 1 syllable; 2nd line 1 syllable; 3rd line 2 syllables; 4th line 3 syllables and so on as is the Fibonacci sequence 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 and so on.
my bedroom ceiling,
outlines of huge, monstrous beings
let free of their prison by my imagination.