Hey there,
This update introduces a new mechanic: stringblock. You can use it like noteblock mechanic but this will use string (tripwire). This allows you to add non solid blocks. Here is an example (textures included):
This is only a preview for now. Please do not enable the mechanic on a production server (you can disable it in mechanics.yml). If you walk in a flower, the tripwire will be redstone powered and its texture will change. This is an important issue and I am still working on it. You could also notice some visual bugs when removing a flower from a lot of connected flowers (this will be fixed, at least partially).
Thanks to Combimagnetron and Raindropz for their help.
I hope you'll like this update,
Thomas