[Abstract] In this project, I focused on algorithm development, trying to combine together two classical algorithms – Random Walk and Branching System and then tried to use it to do some designs. I started with simple rules to mimic Random Walk behavior then played with the algorithm and also introduced more new features into it to gain more control, get more possibilities and increase its complexities. Then I added the Branching function, and this additional function converted the whole algorithm into a space-filling algorithm, which generates more interesting results. Next, the algorithm was extended from 2D to 3D, having more practical meaning in the design field. Thus, in the end, I successfully used this algorithm developed by myself to finish a concept design for a public installation.