Fold the paper into two equal halves.
Take a long piece of thread.
Dip the first part of the thread in red colour, the second part in blue and end part of it in green colour, as you see here.
Now take it out of the paint carefully, and place it on one half of the paper. You can place it in any pattern.
Fold the other half of the paper over it and put a book on it.
Now, press the book with hand and pull out the thread with the other hand. Take the thread fully from the paper.
Now, open the paper, you will some awesome designs.
Use different colours and make more designs. Have fun and develop your imagination.