If you cut a tree, what causes a red design in the center?
The red design that you see at the center after cutting trees or before cutting trees is actually a mark or a sign that, that tree is ti be cut or chopped next. That it is one of the chosen trees to be down next.
It is very bad to cut down trees, but I am not sure because I prefer to plant trees than to cut them.
What you seeing in the center of the tree is called heartwood. There may also be some fat wood, which are pockets of sap that run through the tree base.