Rookie user; need help please

New user, apologies for asking for help for IF statement with several conditions.

If cell value is<7, then return "purple fill" of the cell, and

if cell value is 7-8:59, then return "green fill" of the cell, and

if cell value is 9-12:59, then return "yellow fill" of the cell and

if cell value is 13-15:59, then return "orange fill" of the cell and

if cell value is >16, then return "red fill of the cell