Vinylcut the light sensor circuits on a piece of wood:
The problem is that the circuits can not stick to the wood very strongly, especially for those FTDI pins. So I put some super glue to make it more stable, which also makes the board really ugly.

But, at least, it works.

I download Neil's basic code. Thanks for the help from Adam and Matt. Really appreciate it.

I used this light sensor to test the fog density:

just start without fog

fog makes the light blurred

fog makes the light almost disappeared

fogger setting