PHP Assignment 6
Create an HTML form  tha will alllow the user to specify a preferred background color when visiting your web site.
notify users that only red, green, blue and white are acceptable colors . When the user selects a color, generate another
screen that thanks the visitor. Set the background to the color( if valid) and set a cookie with this preference.
 Write a script that ensures that the background will appear in this color when the user visits your site again.