hi. i love this example but cant make it work: in the text it says '....move it around to create a curved pattern', but it doesn't say 'How'. I am trying any possible mouse moves but the string is not moving. Could you please help specify how to move the white string? thanks!

Hi Tatjana, sorry this is indeed not clearly explained. You actually have to drag a node around to move the sting around. Here is a movie showing how this can be done https://twitter.com/karim_douieb/status/1293870188434251776 Have fun ;)