two different use of the grid

https://youtu.be/pVtlQu3OEdY
A grid has a center, a starting point in the lower left corner and a fixed distance between the grid points. We customize the functions so that the (p, q) point moves to the center of the window.
def matrix (p , q , radius , dx ): ex def matrix (- 0. 5 , 0 , 1 , 0.05 ):
After the grid is saved, we can use it many times in different contexts. Each point in the grid is connected to a "Julia Universe", called (a, b). For example, the Douadys Rabbit. Each point in the "Julia Univers" belongs to a binary tree , a family tree with a father branch,a mother branch and a branch of the child. In this video we are only studying the children branch . Each point in the coordinate system defines a Julia Universe.

Every point in a "Julia Univers" belongs to a family tree. The characteristics of each universe are determined by these family trees. There are two subsets of families in a "universe": "Faithful Families" and "Escape Children Families". To test the family tree for a node (x, y), we follow the child's branches. The branches will remain near Origo or disappear. Near Origo we can observe "animals" like the Douadys Rabbit or other "creatures". no place in the "universe" is empty.Each point is a node in a family tree. If we follow the mother's branch, we come to "Old Lady's Home". Two and two points, (x, y) and (-x, -y) are connected, (entanglement?). They are the parents of the same child.