How to draw architectural bubbles

First, you draw a function block in the form of a bubble, such as a circle in the toilet with a bubble in the middle. The kitchen is marked in the middle of a circle. . . Then these bubbles are connected by line segments. If the relationship between blocks is close, there will be many line segments connected with them. Through the relationship of these lines, we can know the relationship between various functions. It can be clear when arranging the location of the block.