### Flowing water light

**Project name：**flowing lights.
**Specific requirements：**When reset, all lights are off. When switch SW1 is turned on, all lights will do flowing action.
**
System design：
**

![](././../../images_dir/1627392019/81.png)

**Hardware Description：**

There are 9 LEDs on the development board, including 1 FPGA_DONE signal indicator, 1 3.3V power indicator, 3 user RGB lights, and 4 user red lights.

![](././../../images_dir/1627392176/82.png)

![](././../../images_dir/1627392207/83.png)

**Development steps：**

1.Start VIVADO development environment, click Create Project, enter the project name and the project directory in the pop-up window.

![](././../../images_dir/1627392283/84.png)

2.Click NEXT to select the device page, here we select xc7a35tftg256-1.

![](././../../images_dir/1627392363/85.png)

3.Write the program and compile it.

![](././../../images_dir/1627392669/86.png)

4.Pin constraint.

![](././../../images_dir/1627392721/87.png)

5.Implement the bitstream generation and then verify the board.

![](././../../images_dir/1627392767/88.png)

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![](././../../images_dir/1703141148/4.png)