A macro or command that can look at a range of numbers and assign a fill color to the cell

I'm a new member, hope I did this correctly. I am working in a major California winery and presently designing a training program for our botttling lines. I would like to have a command that will look at a column of numbers from 0 to 5.0 and designate a fill color of my choice to four (4) ranges.

Thanks
Mack